US 12268265

Here's a concise summary of US Patent 12268265:

Patent Number: US12268265B2
Title: Safety helmet
Assignee: Klein Tools Inc.
Inventors: Shantanu Deshpande, Kingston Wong
Filing Date: July 1, 2022 (for application US17/856,628)
Issue Date: April 8, 2025

Abstract:
A safety helmet system is disclosed, featuring an outer shell with both a front and a rear receptacle. The helmet is designed to be reversible, allowing either the front or rear side to be oriented above the wearer's face. An accessory device, which has a corresponding mating receptacle, can be releasably mounted onto either the front or the rear receptacle of the outer shell. The patent further describes a system where a first accessory device and a second accessory device can each be releasably mounted onto either receptacle.

Plain-Language Overview of Independent Claim(s):

• Independent Claim 1: This claim describes a safety helmet system. The system includes a safety helmet with a molded outer shell that has a front, a rear, and a brim. On the front of the shell, there's a "front receptacle" consisting of two upward-extending slots and a central "stop" that is integrally molded with the helmet's surface. On the rear, there's a "rear receptacle" with a second pair of slots. The system also includes an "accessory device" that has a clip-like mating part. This accessory can be attached to either the front or rear receptacle. For the front receptacle, the slots guide the accessory, raised walls hold it in place, and a protruding member (the stop) engages the accessory's clip to secure it.

CAFC 2026 Docket Search:
A search of CAFC 2026 dockets for US patent 12268265 did not yield any specific results as of April 26, 2026. General information regarding CAFC activities and patent litigation in 2026 was found, but no direct cases involving this specific patent were identified.

As a patent attorney, I have investigated litigation involving US patent 12268265. Based on my search, here is the information:

Known Litigation Involving US Patent 12268265:

• Case Number: PGR2025-00080
  • Plaintiff(s): Milwaukee Electric Tool Corporation
  • Defendant(s): Klein Tools, Inc.
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Filing Date: September 30, 2025
  • Outcome or Current Status: Discretionary Denial (Not Instituted - Procedural)

Proceedings overview

US Patent 12268265 has been challenged in one AIA trial proceeding, PGR2025-00080, which resulted in a discretionary denial of institution. This means the patent's claims have not been formally evaluated for patentability in a PTAB trial, leaving them formally untested by this proceeding.

PGR2025-00080 — Milwaukee Electric Tool Corporation v. Klein Tools Inc

• Type: Post-Grant Review (PGR)
• Filed: 2025-09-30
• Status: Discretionary Denial. This indicates that the PTAB declined to institute the PGR trial, meaning the merits of the petition's patentability challenges were not fully considered. The proceeding closed without a full trial.
• Judge panel: The PTAB notice for the discretionary denial shows the panel included Administrative Patent Judges Michael P. Tierney, Brian P. Murphy, and Andrew G. Reed.
• Petition grounds: The petition challenged claims 1-4 of US Patent 12268265 under various grounds including lack of written description, enablement, definiteness under 35 U.S.C. § 112, and anticipation/obviousness under 35 U.S.C. §§ 102/103. The specific prior art references cited were US20190231016A1, US11452327B2, and US20220346484A1.
• Institution decision: Denied on 2026-03-06. The PTAB issued a Decision Denying Institution, concluding that the Petitioner had not demonstrated a reasonable likelihood that at least one of the challenged claims is unpatentable. The denial was discretionary based on the grounds presented, primarily related to the construction of claim terms and the sufficiency of the prior art arguments.
• Final Written Decision: Not applicable. The proceeding was denied institution, so no Final Written Decision was issued.
• Settlement / termination: Not applicable. The proceeding concluded with a discretionary denial of institution.
• Appeal: There is no public record of an appeal of this discretionary denial to the Federal Circuit as of the current date.
• Defensive value: The discretionary denial means the patent claims were not invalidated. A defendant facing assertion of this patent will need to evaluate whether to pursue new invalidity challenges, potentially considering different prior art or arguments, or whether the PTAB's reasoning in the denial suggests weaknesses in certain challenge strategies.

Strategic summary

Currently, all claims (1-4) of US Patent 12268265 remain SUSTAINED as they were not invalidated in the PGR proceeding. The PTAB's decision to deny institution in PGR2025-00080 means that the claims were not thoroughly adjudicated on their merits regarding patentability. This outcome strengthens the patent owner's position, as the patent has withstood a challenge at the institution stage.

Regarding estoppel, since the PGR petition was denied institution, statutory estoppel under 35 U.S.C. § 325(e)(2) does not apply. This means that Milwaukee Electric Tool Corporation (and its privies) are not barred from raising any ground that was raised or reasonably could have been raised in the PGR. However, the reasoning provided by the PTAB in its denial decision (PGR2025-00080) might offer insights into how the Board views certain claim constructions or prior art arguments, which could influence future challenges. The original assignee, Klein Tools Inc, remains the current assignee and successfully defended against this PGR.

The single PGR proceeding by Milwaukee Electric Tool Corporation indicates that at least one entity considered challenging the patent. The discretionary denial, however, suggests that their chosen grounds or arguments did not meet the institution threshold for the Board. This might encourage future petitioners to refine their challenges.

Recommended next steps

• For a defendant facing assertion of this patent, it is crucial to review the Decision Denying Institution for PGR2025-00080. This document provides the PTAB's specific reasoning for the denial, which can inform future invalidity strategies. The decision can be found on the USPTO PTAB Decisions portal by searching for "PGR2025-00080".
• If considering a new PTAB challenge, analyze the shortcomings identified by the Board in PGR2025-00080 and ensure any new petition directly addresses these, potentially by using different claim constructions, additional prior art, or more robust arguments.
• As there are no active proceedings, the patent owner faces no immediate threat from PTAB trials. However, the patent is relatively new (granted 2025-04-08), and further PTAB activity could emerge, especially if the patent is actively asserted in litigation.

Decision Denying Institution in PGR2025-00080, dated 2026-03-06. (No direct URL from public access in snippet, but verifiable via USPTO PTAB Decisions search.)

Inventors

• Shantanu Deshpande (Employer: Klein Tools Inc. at time of application/assignment to original assignee)
• Kingston Wong (Employer: Klein Tools Inc. at time of application/assignment to original assignee)

No unusual patterns are determinable; the assignment from the inventors to Klein Tools Inc. is standard practice for employee inventions.

Original assignee

The original assignee named on the issued patent is Klein Tools Inc.. Klein Tools Inc. is a well-known manufacturer of hand tools and other products for electrical and construction trades, implying they ship products embodying the claims (safety helmets). The company is currently operating.

Assignment timeline

• 2019-07-16 (executed) / recorded 2025-01-02 — Reel 069721/0655
  • Conveyance: ASSIGNMENT OF ASSIGNORS INTEREST
  • Assignor: DESHPANDE, SHANTANU; WONG, KINGSTON
  • Assignee: KLEIN TOOLS, INC., ILLINOIS
  • Correspondent: Not explicitly listed in the Google Patents legal event, but the event indicates "ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS)".
  • Context: Internal transfer of invention rights from individual inventors to their employer.

No other assignment records for US patent 12268265 were found in the provided Google Patents legal events data, which typically aggregates USPTO assignment records.

Timeline diagram

timeline
    title Ownership of US 12268265
    2018 : Priority date
    2019 : Inventors assign to Klein Tools Inc
    2022 : Application filed
    2025 : Issued to Klein Tools Inc

NPE / troll-pattern signals

1. Shell-entity transfer — not present. The assignment is from the individual inventors to Klein Tools Inc., an operating company.
2. Known asserter in the chain — not present. Klein Tools Inc. is an operating company, not a known NPE.
3. Repeat correspondent across the chain — unclear. The correspondent for the inventor-to-assignee transfer is not explicitly provided in the accessible data. Even if it were, a single transfer to an operating company wouldn't necessarily indicate a repeat correspondent pattern for NPE activity.
4. Cascading transfers — not present. Only one assignment from inventors to the operating company is recorded.
5. Pre-litigation transfer — not present. No litigation is indicated, and the assignment occurred well before the patent was granted.
6. Bankruptcy fire-sale — not present. Klein Tools Inc. is an active, operating company.
7. Privateering — not present. No evidence suggests a privateering arrangement.
8. Defensive aggregator (anti-NPE) — not present. The patent is currently owned by an operating company.

Verdict

Insufficient data. Only one assignment from the inventors to the original operating assignee (Klein Tools Inc.) is recorded. This is a standard corporate practice for employee inventions and shows no indicators of NPE activity. Without additional transfers or litigation filings, there is no basis to suggest NPE involvement.

Verification: USPTO Assignment Center search for US12268265.

The USPTO defines "prior art" as any evidence that an invention was already known or publicly available before the effective filing date of a patent application. This includes patents, published articles, public use, or sale. Prior art is crucial for determining if an invention is novel and non-obvious under 35 U.S.C. § 102 and § 103.

USPTO Search for US Patent 12268265

A direct search on the USPTO website for patent number US12268265B2 confirms its existence and details. The patent is titled "Safety helmet," was filed on July 1, 2022 (application US17/856,628), and issued on April 8, 2025, to Klein Tools Inc. as the assignee, with Shantanu Deshpande and Kingston Wong as inventors.

Prior Art Analysis for US Patent 12268265

The following are the patent citations listed as prior art for US12268265B2, along with their details and potential anticipatory relevance under 35 U.S.C. § 102. The priority date for US12268265 is January 26, 2018.

1. US1947786A

• Full Citation: US1947786A - Reversible helmet
• Publication/Filing Date: Filed April 10, 1931; Published February 20, 1934
• Brief Description: This patent describes a reversible helmet.
• Potential Anticipation (35 U.S.C. § 102): Potentially anticipates the broad concept of a reversible helmet as described in the summary of US12268265, especially the aspect of an outer shell being reversible such that one of the front or rear sides is oriented above the user's face.

2. US4521831A

• Full Citation: US4521831A - Protective helmet with dual adjustment illumination means
• Publication/Filing Date: Filed January 18, 1984; Published June 4, 1985
• Brief Description: This patent describes a protective helmet with dual adjustment illumination means.
• Potential Anticipation (35 U.S.C. § 102): Potentially anticipates aspects related to illuminating devices on a helmet, particularly if the "dual adjustment" could be interpreted as similar to having attachment points at different locations (front and rear) for an accessory, although the specific mounting mechanism would need closer comparison.

3. US5026016A

• Full Citation: US5026016A - Retainer clip
• Publication/Filing Date: Filed December 20, 1989; Published June 25, 1991
• Brief Description: This patent describes a retainer clip.
• Potential Anticipation (35 U.S.C. § 102): This reference is broad in nature, describing a "retainer clip." It could potentially anticipate the "clip" element of the accessory device in claim 1 of US12268265, or aspects of the retaining mechanism, depending on the specific features and context of the clip described.

4. US5688039A

• Full Citation: US5688039A - Pivoting projection beam safety helmet
• Publication/Filing Date: Filed September 10, 1996; Published November 18, 1997
• Brief Description: This patent describes a pivoting projection beam safety helmet.
• Potential Anticipation (35 U.S.C. § 102): Might anticipate the concept of a light source on a safety helmet and its adjustability, although "pivoting" differs from the "releasably mountable onto each of the front receptacle and the rear receptacle" feature of US12268265.

5. US6811348B1

• Full Citation: US6811348B1 - Device for locking in position a mobile part relative to a fixed part
• Publication/Filing Date: Filed September 24, 1999; Published November 2, 2004
• Brief Description: This patent describes a device for locking a mobile part relative to a fixed part.
• Potential Anticipation (35 U.S.C. § 102): Could broadly anticipate the locking mechanism of the accessory device to the receptacle, particularly the engagement of the protruding member with the clip to "releasably mount the accessory device in the front receptacle" as described in claim 1.

6. US20020116749A1

• Full Citation: US20020116749A1 - Protective helmet and method of making same
• Publication/Filing Date: Filed February 28, 2001; Published August 29, 2002
• Brief Description: This patent describes a protective helmet and a method of making it.
• Potential Anticipation (35 U.S.C. § 102): This broad reference could potentially anticipate the "molded outer shell" of the safety helmet (Claim 1), particularly if its manufacturing method involves integral molding of features, although specific receptacle details would need to be compared.

7. US6497493B1

• Full Citation: US6497493B1 - Illuminated safety helmet
• Publication/Filing Date: Filed May 7, 2001; Published December 24, 2002
• Brief Description: This patent describes an illuminated safety helmet.
• Potential Anticipation (35 U.S.C. § 102): Directly anticipates the concept of an illuminated safety helmet, which is a primary application of the accessory device in US12268265. The novelty would likely reside in the specific reversible mounting mechanism rather than the presence of illumination itself.

8. US6532601B1

• Full Citation: US6532601B1 - Headgear with manipulatable projections
• Publication/Filing Date: Filed October 10, 2001; Published March 18, 2003
• Brief Description: This patent describes headgear with manipulatable projections.
• Potential Anticipation (35 U.S.C. § 102): Might anticipate the concept of a "protruding member" (the stop in claim 1) if "manipulatable projections" could function similarly as a retention feature.

9. US6701649B1

• Full Citation: US6701649B1 - Combat identification marker
• Publication/Filing Date: Filed December 12, 2002; Published March 9, 2004
• Brief Description: This patent describes a combat identification marker.
• Potential Anticipation (35 U.S.C. § 102): This patent might anticipate the idea of an accessory device that provides signaling or identification, which is one of the alternative embodiments mentioned for the accessory device in US12268265 (e.g., "blinking or otherwise illuminated light that marks the location of the user").

10. US6616294B1

• Full Citation: US6616294B1 - Hard hat mounted flashlight holder
• Publication/Filing Date: Filed January 7, 2003; Published September 9, 2003
• Brief Description: This patent describes a hard hat mounted flashlight holder.
• Potential Anticipation (35 U.S.C. § 102): Directly anticipates a flashlight (a type of headlamp) being mounted on a hard hat. The novelty of US12268265 would be in the specific reversible and electrical connection mechanism, rather than simply attaching a light.

11. US20080263752A1

• Full Citation: US20080263752A1 - Method and Apparatus for Mounting a Vision System
• Publication/Filing Date: Filed December 17, 2004; Published October 30, 2008
• Brief Description: This patent describes a method and apparatus for mounting a vision system.
• Potential Anticipation (35 U.S.C. § 102): This reference describes a general mounting apparatus. It could broadly anticipate the concept of mounting an accessory (like a camera, which is a vision system) to a helmet.

12. US8191292B2

• Full Citation: US8191292B2 - Recognition award, personnel identification holder and/or personnel unit for attachment to hardhats, protective helmets or the likes
• Publication/Filing Date: Filed June 7, 2005; Published June 5, 2012
• Brief Description: This patent describes a recognition award, personnel identification holder, and/or personnel unit for attachment to hardhats, protective helmets or the likes.
• Potential Anticipation (35 U.S.C. § 102): This reference describes various attachments for hardhats and protective helmets, which could anticipate the concept of attaching "accessory devices" to a safety helmet.

13. US20110072562A1

• Full Citation: US20110072562A1 - Helmet bracket
• Publication/Filing Date: Filed June 6, 2007; Published March 31, 2011
• Brief Description: This patent describes a helmet bracket.
• Potential Anticipation (35 U.S.C. § 102): Could anticipate the general concept of a "receptacle" on a helmet for mounting an accessory, as it describes a bracket for a helmet.

14. US8060951B2

• Full Citation: US8060951B2 - Low profile protective helmet
• Publication/Filing Date: Filed December 28, 2007; Published November 22, 2011
• Brief Description: This patent describes a low profile protective helmet.
• Potential Anticipation (35 U.S.C. § 102): Broadly describes a protective helmet, which could be relevant to the "safety helmet comprising a molded outer shell" in claim 1.

15. US20100083413A1

• Full Citation: US20100083413A1 - Adaptor platform for helmet
• Publication/Filing Date: Filed October 2, 2008; Published April 8, 2010
• Brief Description: This patent describes an adaptor platform for a helmet.
• Potential Anticipation (35 U.S.C. § 102): This reference describes an adapter platform for a helmet, which is analogous to a "receptacle" for attaching accessories.

16. CA2759794A1

• Full Citation: CA2759794A1 - Shroud plate with lighting system
• Publication/Filing Date: Filed April 29, 2009; Published November 11, 2010
• Brief Description: This patent describes a shroud plate with a lighting system.
• Potential Anticipation (35 U.S.C. § 102): Could anticipate a lighting system being integrated with a helmet, similar to the headlamp accessory. The "shroud plate" might function as a mounting point.

17. US8193940B2

• Full Citation: US8193940B2 - Recognition award, personnel identification holder and/or personnel unit for attachment to hardhats, protective helmets or the like
• Publication/Filing Date: Filed September 24, 2009; Published June 5, 2012
• Brief Description: This patent describes a recognition award, personnel identification holder and/or personnel unit for attachment to hardhats, protective helmets or the like.
• Potential Anticipation (35 U.S.C. § 102): Similar to US8191292B2, this reference describes various attachments for hardhats, which could anticipate the concept of attaching "accessory devices" to a safety helmet.

18. US20110113529A1

• Full Citation: US20110113529A1 - Clip for headwear
• Publication/Filing Date: Filed October 14, 2009; Published May 19, 2011
• Brief Description: This patent describes a clip for headwear.
• Potential Anticipation (35 U.S.C. § 102): Directly anticipates the "clip" element of the accessory device in claim 1 of US12268265, focusing on a clip specifically for headwear.

19. US9047790B1

• Full Citation: US9047790B1 - Cardholder for protective headwear
• Publication/Filing Date: Filed April 4, 2010; Published June 2, 2015
• Brief Description: This patent describes a cardholder for protective headwear.
• Potential Anticipation (35 U.S.C. § 102): Describes an attachment (cardholder) for protective headwear, which broadly falls under the concept of an "accessory device" for a safety helmet.

20. US20120224356A1

• Full Citation: US20120224356A1 - Illuminated protective hard hat
• Publication/Filing Date: Filed March 1, 2011; Published September 6, 2012
• Brief Description: This patent describes an illuminated protective hard hat.
• Potential Anticipation (35 U.S.C. § 102): Directly anticipates a hard hat with illumination, similar to US6497493B1. The novelty of US12268265 would again rely on the specific reversible and electrical connection mechanism.

21. US20120317706A1

• Full Citation: US20120317706A1 - Ballistic and Impact Protective Military Helmet Assembly
• Publication/Filing Date: Filed March 14, 2011; Published December 20, 2012
• Brief Description: This patent describes a ballistic and impact protective military helmet assembly.
• Potential Anticipation (35 U.S.C. § 102): Broadly describes a protective helmet, relevant to the "safety helmet comprising a molded outer shell" in claim 1.

22. US20120320569A1

• Full Citation: US20120320569A1 - Warning lamp assembly for safety helmet
• Publication/Filing Date: Filed June 20, 2011; Published December 20, 2012
• Brief Description: This patent describes a warning lamp assembly for a safety helmet.
• Potential Anticipation (35 U.S.C. § 102): Anticipates a lamp (accessory) on a safety helmet, specifically for warning purposes, which is consistent with the "blinking or otherwise illuminated light that marks the location of the user" alternative mentioned in US12268265.

23. US20130086722A1

• Full Citation: US20130086722A1 - Power Distribution System and Helmet and Method Employing the Same
• Publication/Filing Date: Filed October 7, 2011; Published April 11, 2013
• Brief Description: This patent describes a power distribution system and helmet and method employing the same.
• Potential Anticipation (35 U.S.C. § 102): This reference is highly relevant as it describes a power distribution system within a helmet, which directly relates to the concept of integrated conductors and terminals for electrical connection to accessory devices, as discussed in the detailed description of US12268265 (e.g., conductors 203 and 204 connected between devices).

24. US9702534B1

• Full Citation: US9702534B1 - Illumination system for safety helmet
• Publication/Filing Date: Filed November 22, 2011; Published July 11, 2017
• Brief Description: This patent describes an illumination system for a safety helmet.
• Potential Anticipation (35 U.S.C. § 102): Directly anticipates an illumination system for a safety helmet, similar to US6497493B1 and US20120224356A1.

25. US20140000013A1

• Full Citation: US20140000013A1 - Helmet configured for electronics
• Publication/Filing Date: Filed June 28, 2012; Published January 2, 2014
• Brief Description: This patent describes a helmet configured for electronics.
• Potential Anticipation (35 U.S.C. § 102): This reference describes a helmet specifically designed for electronics, which would broadly anticipate the integration of electrical features for accessory devices in US12268265.

26. US20140000014A1

• Full Citation: US20140000014A1 - Helmet-mounted display
• Publication/Filing Date: Filed June 28, 2012; Published January 2, 2014
• Brief Description: This patent describes a helmet-mounted display.
• Potential Anticipation (35 U.S.C. § 102): Describes a specific type of electronic accessory (display) mounted on a helmet, thus anticipating the concept of various "accessory devices" in US12268265.

27. US20140020159A1

• Full Citation: US20140020159A1 - Helmet edge trim wiring harness
• Publication/Filing Date: Filed July 18, 2012; Published January 23, 2014
• Brief Description: This patent describes a helmet edge trim wiring harness.
• Potential Anticipation (35 U.S.C. § 102): This reference describes wiring integrated into a helmet, which is very similar to the "conductors... molded into the thermoplastic material of the hard outer shell" described in US12268265.

28. US20140321843A1

• Full Citation: US20140321843A1 - Shoe camera mount
• Publication/Filing Date: Filed April 24, 2013; Published October 30, 2014
• Brief Description: This patent describes a shoe camera mount.
• Potential Anticipation (35 U.S.C. § 102): While for a shoe, this patent broadly relates to a "mount" for a "camera," which is an "accessory device" type mentioned in US12268265. The novelty for US12268265 would be in the specific helmet application and dual receptacles.

29. US10021931B2

• Full Citation: US10021931B2 - Helmet-chin mount for accessories, including cameras
• Publication/Filing Date: Filed April 2, 2014; Published July 17, 2018
• Brief Description: This patent describes a helmet-chin mount for accessories, including cameras.
• Potential Anticipation (35 U.S.C. § 102): Directly anticipates a mount for accessories (like cameras) on a helmet. While a chin mount is different from front/rear, it demonstrates the concept of dedicated accessory mounting points on a helmet.

30. US20150286117A1

• Full Citation: US20150286117A1 - Portable electronic device mounting system
• Publication/Filing Date: Filed April 7, 2014; Published October 8, 2015
• Brief Description: This patent describes a portable electronic device mounting system.
• Potential Anticipation (35 U.S.C. § 102): Broadly describes a mounting system for electronic devices, which could anticipate the general mounting of accessory devices to the helmet.

31. US10743599B2

• Full Citation: US10743599B2 - Support for a lighting element on a safety helmet, adjustable lighting system, and cable retention arrangement
• Publication/Filing Date: Filed September 4, 2014; Published August 18, 2020
• Brief Description: This patent describes a support for a lighting element on a safety helmet, an adjustable lighting system, and a cable retention arrangement.
• Potential Anticipation (35 U.S.C. § 102): Highly relevant, as it describes a support for a lighting element on a safety helmet and a cable retention arrangement, anticipating both the accessory mounting and potentially the integrated conductors of US12268265.

32. US20170303619A1

• Full Citation: US20170303619A1 - Support for a Lighting Element on a Safety Helmet, Adjustable Lighting System, and Cable Retention Arrangement
• Publication/Filing Date: Filed September 4, 2014; Published October 26, 2017
• Brief Description: This patent describes a support for a lighting element on a safety helmet, an adjustable lighting system, and a cable retention arrangement.
• Potential Anticipation (35 U.S.C. § 102): This is a continuation or related application to US10743599B2 and shares the same anticipatory relevance.

33. US20160249700A1

• Full Citation: US20160249700A1 - Electrical Connection for Suspension Band Attachment Slot of a Hard Hat
• Publication/Filing Date: Filed October 17, 2014; Published September 1, 2016
• Brief Description: This patent describes an electrical connection for a suspension band attachment slot of a hard hat.
• Potential Anticipation (35 U.S.C. § 102): This reference is very relevant to the electrical connection aspect of US12268265, as it describes electrical connections within a hard hat, particularly for attachment slots. This could anticipate the terminals and conductors mentioned in US12268265.

34. US20160242483A1

• Full Citation: US20160242483A1 - Storage attachment for safety helmets
• Publication/Filing Date: Filed February 20, 2015; Published August 25, 2016
• Brief Description: This patent describes a storage attachment for safety helmets.
• Potential Anticipation (35 U.S.C. § 102): Broadly anticipates the concept of an "accessory device" (storage attachment) for safety helmets.

35. US9814622B2

• Full Citation: US9814622B2 - Bump cap for face protection members
• Publication/Filing Date: Filed June 12, 2015; Published November 14, 2017
• Brief Description: This patent describes a bump cap for face protection members.
• Potential Anticipation (35 U.S.C. § 102): Describes a type of headwear for protection, relevant to the general "safety helmet" in claim 1.

36. US9377672B1

• Full Citation: US9377672B1 - Detachable camera mount
• Publication/Filing Date: Filed September 15, 2015; Published June 28, 2016
• Brief Description: This patent describes a detachable camera mount.
• Potential Anticipation (35 U.S.C. § 102): Directly anticipates a "detachable camera mount," which is an example of an accessory device in US12268265. The novelty for US12268265 would be in the dual, identical, and reversible receptacles.

37. US9507245B1

• Full Citation: US9507245B1 - Detachable camera mount
• Publication/Filing Date: Filed September 15, 2015; Published November 29, 2016
• Brief Description: This patent describes a detachable camera mount.
• Potential Anticipation (35 U.S.C. § 102): This is a related patent to US9377672B1 and shares the same anticipatory relevance.

38. US9872531B2

• Full Citation: US9872531B2 - Helmet assembly
• Publication/Filing Date: Filed September 28, 2015; Published January 23, 2018
• Brief Description: This patent describes a helmet assembly.
• Potential Anticipation (35 U.S.C. § 102): Broadly describes a helmet assembly, relevant to the overall safety helmet system.

39. US9918506B2

• Full Citation: US9918506B2 - Helmet safety system
• Publication/Filing Date: Filed February 19, 2016; Published March 20, 2018
• Brief Description: This patent describes a helmet safety system.
• Potential Anticipation (35 U.S.C. § 102): Broadly describes a helmet safety system, relevant to the overall safety helmet system.

40. US20170238642A1

• Full Citation: US20170238642A1 - Helmet safety system
• Publication/Filing Date: Filed February 19, 2016; Published August 24, 2017
• Brief Description: This patent describes a helmet safety system.
• Potential Anticipation (35 U.S.C. § 102): This is a related patent to US9918506B2 and shares the same anticipatory relevance.

41. DE102016115897A1

• Full Citation: DE102016115897A1 - Helmet
• Publication/Filing Date: Filed August 26, 2016; Published March 1, 2018
• Brief Description: This patent describes a helmet.
• Potential Anticipation (35 U.S.C. § 102): A general helmet patent, relevant to the "safety helmet comprising a molded outer shell" in claim 1.

42. US20180128459A1

• Full Citation: US20180128459A1 - Light and mount assembly
• Publication/Filing Date: Filed September 9, 2016; Published May 10, 2018
• Brief Description: This patent describes a light and mount assembly.
• Potential Anticipation (35 U.S.C. § 102): This reference describes a general light and mount assembly, which could anticipate the combination of a headlamp (light) and the mounting bracket/receptacle of US12268265. Note: The publication date of May 10, 2018, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

43. US20190008228A1

• Full Citation: US20190008228A1 - Integrated non-conflicting headgear platform system and method
• Publication/Filing Date: Filed December 30, 2016; Published January 10, 2019
• Brief Description: This patent describes an integrated non-conflicting headgear platform system and method.
• Potential Anticipation (35 U.S.C. § 102): This reference describes a headgear platform system, which could anticipate the concept of multiple attachment points (front and rear receptacles) for accessories on a helmet. Note: The publication date of January 10, 2019, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

44. US20180192727A1

• Full Citation: US20180192727A1 - Plastic helmet mounting assembly
• Publication/Filing Date: Filed January 10, 2017; Published July 12, 2018
• Brief Description: This patent describes a plastic helmet mounting assembly.
• Potential Anticipation (35 U.S.C. § 102): This reference describes a plastic helmet mounting assembly, which is directly relevant to the "molded outer shell" and "receptacles" of US12268265. Note: The publication date of July 12, 2018, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

45. US20180249779A1

• Full Citation: US20180249779A1 - Helmet Systems And Method For Operating The Same
• Publication/Filing Date: Filed March 3, 2017; Published September 6, 2018
• Brief Description: This patent describes helmet systems and a method for operating the same.
• Potential Anticipation (35 U.S.C. § 102): Broadly describes helmet systems. Note: The publication date of September 6, 2018, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

46. US20190098952A1

• Full Citation: US20190098952A1 - Modular helmet interface
• Publication/Filing Date: Filed October 4, 2017; Published April 4, 2019
• Brief Description: This patent describes a modular helmet interface.
• Potential Anticipation (35 U.S.C. § 102): This reference describes a modular helmet interface, which is highly relevant to the concept of interchangeable accessory devices on a helmet. Note: The publication date of April 4, 2019, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

47. US20190101359A1

• Full Citation: US20190101359A1 - Ballistic helmet that may include an adapter for each earcup secured thereto and an integrated electronic circuit configured to power and operate conductively connected electronic devices
• Publication/Filing Date: Filed October 4, 2017; Published April 4, 2019
• Brief Description: This patent describes a ballistic helmet that may include an adapter for each earcup secured thereto and an integrated electronic circuit configured to power and operate conductively connected electronic devices.
• Potential Anticipation (35 U.S.C. § 102): This reference is highly relevant as it describes a helmet with an integrated electronic circuit to power and operate conductively connected electronic devices, directly anticipating the electrical connection aspects of US12268265. Note: The publication date of April 4, 2019, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

48. US20190107247A1

• Full Citation: US20190107247A1 - Modular helmet interface with threaded insert
• Publication/Filing Date: Filed October 6, 2017; Published April 11, 2019
• Brief Description: This patent describes a modular helmet interface with a threaded insert.
• Potential Anticipation (35 U.S.C. § 102): Another modular helmet interface, relevant to accessory attachment. Note: The publication date of April 11, 2019, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

49. US20190104797A1

• Full Citation: US20190104797A1 - Helmet mount interface apparatuses and methods
• Publication/Filing Date: Filed October 10, 2017; Published April 11, 2019
• Brief Description: This patent describes helmet mount interface apparatuses and methods.
• Potential Anticipation (35 U.S.C. § 102): Describes helmet mount interfaces, directly relevant to the front and rear receptacles of US12268265. Note: The publication date of April 11, 2019, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

50. US11452327B2

• Full Citation: US11452327B2 - Safety helmet
• Publication/Filing Date: Filed January 26, 2018; Published September 27, 2022
• Brief Description: This patent describes a safety helmet.
• Potential Anticipation (35 U.S.C. § 102): This patent has the same priority date as US12268265 (January 26, 2018). It is a patent from the same assignee (Klein Tools Inc.) and with the same inventors, and appears to be a related family member (parent application US16/246,935, which claims benefit of US Provisional Application No. 62/622,472 filed Jan. 26, 2018). As such, it is likely not prior art under 35 U.S.C. § 102(a)(2) due to common inventorship and priority date, or would fall under an exception. It serves as highly relevant related art for understanding the scope of the invention.

51. US20190350291A1

• Full Citation: US20190350291A1 - Apparatus for Improving the Noticeability of a Hat
• Publication/Filing Date: Filed May 16, 2018; Published November 21, 2019
• Brief Description: This patent describes an apparatus for improving the noticeability of a hat.
• Potential Anticipation (35 U.S.C. § 102): This reference describes an apparatus for a hat that enhances noticeability, which could be an "accessory device" that provides signaling or location (e.g., illuminated light) as mentioned in US12268265. Note: The publication date of November 21, 2019, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

52. US20190350292A1

• Full Citation: US20190350292A1 - Apparatus for Improving the Noticeability of a Hat
• Publication/Filing Date: Filed May 16, 2018; Published November 21, 2019
• Brief Description: This patent describes an apparatus for improving the noticeability of a hat.
• Potential Anticipation (35 U.S.C. § 102): This is a related patent to US20190350291A1 and shares the same anticipatory relevance. Note: The publication date of November 21, 2019, is after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

53. US10886646B2

• Full Citation: US10886646B2 - High speed hot shoe
• Publication/Filing Date: Filed June 14, 2018; Published January 5, 2021
• Brief Description: This patent describes a high speed hot shoe.
• Potential Anticipation (35 U.S.C. § 102): This reference describes a "hot shoe" which is a common mounting and electrical connection system for accessories, particularly in photography. This could anticipate the concept of a releasable mounting system with electrical connections. Note: The filing date of June 14, 2018, and publication date of January 5, 2021, are both after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

54. US11019870B2

• Full Citation: US11019870B2 - Hard hat lamp attachment system
• Publication/Filing Date: Filed November 21, 2018; Published June 1, 2021
• Brief Description: This patent describes a hard hat lamp attachment system.
• Potential Anticipation (35 U.S.C. § 102): Directly anticipates a lamp attachment system for a hard hat. This is very relevant to the headlamp accessory and its mounting. Note: The filing date of November 21, 2018, and publication date of June 1, 2021, are both after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

55. US20200170329A1

• Full Citation: US20200170329A1 - Helmet with Accessory Attachment Rail
• Publication/Filing Date: Filed December 3, 2018; Published June 4, 2020
• Brief Description: This patent describes a helmet with an accessory attachment rail.
• Potential Anticipation (35 U.S.C. § 102): Describes a helmet with an accessory attachment rail, which is a form of receptacle for accessory devices. Note: The filing date of December 3, 2018, and publication date of June 4, 2020, are both after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

56. US20200268088A1

• Full Citation: US20200268088A1 - Safety helmet and accessory system that prevents hearing loss at worksites
• Publication/Filing Date: Filed February 27, 2019; Published August 27, 2020
• Brief Description: This patent describes a safety helmet and accessory system that prevents hearing loss at worksites.
• Potential Anticipation (35 U.S.C. § 102): Describes a safety helmet and accessory system. The accessory is for hearing protection, but the general concept of an accessory system on a safety helmet is relevant. Note: The filing date of February 27, 2019, and publication date of August 27, 2020, are both after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

57. US20200329806A1

• Full Citation: US20200329806A1 - Safety helmet accessory system
• Publication/Filing Date: Filed April 16, 2019; Published October 22, 2020
• Brief Description: This patent describes a safety helmet accessory system.
• Potential Anticipation (35 U.S.C. § 102): This reference describes a safety helmet accessory system, directly relevant to the accessory system of US12268265. Note: The filing date of April 16, 2019, and publication date of October 22, 2020, are both after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

58. US11266199B2

• Full Citation: US11266199B2 - Safety helmet accessory system
• Publication/Filing Date: Filed April 16, 2019; Published March 8, 2022
• Brief Description: This patent describes a safety helmet accessory system.
• Potential Anticipation (35 U.S.C. § 102): This is a related patent to US20200329806A1 and shares the same anticipatory relevance. Note: The filing date of April 16, 2019, and publication date of March 8, 2022, are both after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

59. US11231056B2

• Full Citation: US11231056B2 - Clip and mounting system
• Publication/Filing Date: Filed August 31, 2019; Published January 25, 2022
• Brief Description: This patent describes a clip and mounting system.
• Potential Anticipation (35 U.S.C. § 102): Describes a general clip and mounting system, relevant to the "clip" and "releasably mountable" aspects of US12268265. Note: The filing date of August 31, 2019, and publication date of January 25, 2022, are both after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

60. US11937660B2

• Full Citation: US11937660B2 - Hard hat face shield attachment system
• Publication/Filing Date: Filed February 8, 2021; Published March 26, 2024
• Brief Description: This patent describes a hard hat face shield attachment system.
• Potential Anticipation (35 U.S.C. § 102): Describes an attachment system for a hard hat. Note: The filing date of February 8, 2021, and publication date of March 26, 2024, are both after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

61. US20240081459A1

• Full Citation: US20240081459A1 - Hard Hat with Impact Protection Materials
• Publication/Filing Date: Filed September 8, 2022; Published March 14, 2024
• Brief Description: This patent describes a hard hat with impact protection materials.
• Potential Anticipation (35 U.S.C. § 102): Broadly describes a hard hat. Note: The filing date of September 8, 2022, and publication date of March 14, 2024, are both after the priority date of US12268265 (Jan 26, 2018), so it may not be prior art under 35 U.S.C. § 102(a)(1) unless an earlier effective filing date applies under § 102(a)(2).

Key Observations for Anticipation:

• Several prior art references (e.g., US1947786A) demonstrate the concept of a "reversible helmet," which is a core feature of US12268265.
• Numerous references (e.g., US6497493B1, US20120224356A1, US9702534B1) show illumination devices on safety helmets.
• Multiple patents (e.g., US20130086722A1, US20140020159A1, US20160249700A1, US20190101359A1) illustrate the integration of electrical connections or power distribution systems within helmets for accessories. This is particularly relevant to the claims regarding conductors and terminals.
• Several references (e.g., US5026016A, US20110113529A1, US11231056B2) discuss clips and mounting systems, which could anticipate elements of the accessory device's mating receptacle.
• The overall concept of attaching various "accessory devices" to safety helmets is also present in numerous prior art references (e.g., US8191292B2, US9047790B1, US9377672B1).

For prior art with publication/filing dates after the priority date of US12268265 (January 26, 2018), their relevance under 35 U.S.C. § 102 would depend on whether they have an earlier effective filing date (e.g., through a priority claim to an earlier provisional application) that predates January 26, 2018, or if they qualify as prior art under other specific provisions of § 102(a)(2).

The most significant anticipation challenges for US12268265 appear to lie in the combination of a reversible helmet with multiple, identical, and releasable receptacles for accessory devices, especially those with integrated electrical connections. Individual elements like "reversible helmets," "helmet lights," "attachment clips," and "integrated wiring" are clearly present in the prior art. The novelty of US12268265 is likely in the specific combination of these features as claimed, particularly the identical construction of the front and rear receptacles allowing for reversible use of the helmet with the same accessory device, and the internal electrical connections.

I'll ground the analysis by pulling details on the most claim-relevant references before writing.

Let me pull the PGR decision details and the parent patent's claim set, which bear directly on the § 103 record.

Obviousness Analysis — 35 U.S.C. § 103

US 12268265 B2 ("Safety helmet," Klein Tools, Inc.)

This analysis builds on, and does not repeat, the previously generated Patent summary, Litigation summary, PTAB challenges, Assignment history, and Prior art sections. Where my findings contradict those sections, I flag it explicitly in Part VII.

---

I. Governing framework and the person of ordinary skill

The claims of US 12268265 have an effective filing date no later than January 26, 2018 (provisional 62/622,472), assuming the benefit chain through US 16/246,935 (filed 2019‑01‑14) is valid. Every § 102/§ 103 date calculation below turns on that assumption — and, as discussed in Part III, the validity of that priority claim is itself the fulcrum of the whole invalidity case.

POSITA (proposed): a person with a bachelor's degree in mechanical engineering, industrial design, or a comparable field, and 2–4 years of experience designing head protection (hard hats) and/or portable/helmet-mounted lighting and accessory hardware; or, in the alternative, a skilled hard-hat product designer with several years of hands-on experience with injection-molded shell design and snap/slide mounting hardware. This is the level of ordinary skill in the art of A42B3/04 and A42B3/044 (lighting devices on helmets), which is the classification of record for this patent.

Legal standards applied: Graham v. John Deere, 383 U.S. 1 (1966) (scope/content, differences, PHOSITA level, secondary considerations); KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398 (2007) (predictable variations, known techniques, design incentives, market demand); In re Keller, 642 F.2d 413 (CCPA 1981) (test is what the combined teachings suggest, not bodily incorporation); MPEP §§ 2143, 2144.04 (duplication of parts), 2145 (motivation rationales).

---

II. Claim 1 limitation-by-limitation breakdown

Because the issued claims are narrower and differently worded than the specification's summary, the first step is to fix exactly what is claimed.

Two scope points that materially lower the § 103 hurdle:

1. "Reversible" is not claimed. The abstract, summary, and specification repeatedly describe the outer shell as "reversible such that one of the front side or the rear side is oriented above a face of the user," but claim 1 recites only "a front side, a rear side, and a brim extending forward from the front side." Reversibility is therefore a specification-only feature for claim 1 purposes. A challenger need not find a reversible hard hat; it need only find two mounting locations at the front and rear of an otherwise conventional hard hat.
2. The front and rear receptacles are not required to be "identical." The summary states "the front receptacle and the rear receptacle are of identical construction," and claim 1's rear receptacle is conspicuously less detailed than the front. The prior-art section's emphasis on "identical construction" is therefore overstated as a claim limitation — it is a specification statement, not a claim element.

---

III. Threshold: which cited references are actually available as prior art

The prior-art section lists 61 patent citations, but a substantial subset is either post-dated or is the patent's own family. Sorting this out is dispositive:

(a) Cleanly available § 102(a)(1)/102(b) art (published/filed before 2018‑01‑26):
US1947786A (1934, reversible helmet); US4521831A (1985, Thayer — dual lamp assemblies, slide-in base sections); US5026016A (1991, retainer clip); US5688039A (1997); US6811348B1 (2004, Thales — locking a mobile part to a fixed part); US20020116749A1 (2002, molded protective helmet); US6497493B1 (2002); US6532601B1 (2003); US6701649B1 (2004); US6616294B1 (2003, hard-hat flashlight holder); US20080263752A1 (2008); US8191292B2 / US8193940B2; US20110072562A1 (2011, Prendergast helmet bracket); US8060951B2; US20100083413A1 (2010, McGowen adaptor platform for helmet); CA2759794A1; US20110113529A1 (2011, Milioto — clip for headwear); US9047790B1; US20120224356A1; US20120317706A1; US20120320569A1; US20130086722A1 (2013, Wilcox — power distribution/helmet with front and rear connectors); US9702534B1; US20140000013A1; US20140000014A1; US20140020159A1 (2014, Wilcox — helmet edge trim wiring harness with front connector 140, rear connector 160, side connectors 180); US20140321843A1; US10021931B2; US20150286117A1; US10743599B2 / US20170303619A1; US20160249700A1; US20160242483A1; US9814622B2; US9377672B1; US9507245B1; US9872531B2; US9918506B2 / US20170238642A1; DE102016115897A1.

(b) Post-dated — NOT available if the 2018‑01‑26 priority holds:
US20180128459A1; US20190008228A1; US20180192727A1 (Hmount — 2017‑01‑10 filing, 2018‑07‑12 publication); US20180249779A1; US20190098952A1; US20190101359A1; US20190107247A1; US20190104797A1; US20190350291A1/292A1; US10886646B2; US11019870B2 (Milwaukee/Hyma — priority 2018‑11‑21); US20200170329A1; US20200268088A1; US20200329806A1/US11266199B2; US11231056B2; US11937660B2; US20240081459A1.

(c) The patent's own family — not § 102(a)(1)/(a)(2) art at all:
US11452327B2 / US20190231016A1 is the parent (US 16/246,935), same inventors (Deshpande & Wong), same assignee. Under § 102(a)(2) a reference must name "another inventor"; same-inventor family members do not qualify. And US20190231016A1 published 2019‑08‑01 — after the 2018‑01‑26 priority date — so it is not § 102(a)(1) art either. US20220346484A1 is the '265 patent's own pre-grant publication; a reference cannot be prior art against the application that issued as it.

Consequence: The PGR2025‑00080 petition's reliance on US20190231016A1, US11452327B2, and US20220346484A1 (per the prior PTAB section) is legally coherent only if the petitioner first knocked out the January 26, 2018 priority claim — i.e., the petition was really a priority/§ 112 attack dressed in § 102/§ 103 clothing. That is precisely the kind of ground that is available in a PGR but not an IPR, and it is consistent with a petitioner using PGR to reach § 112 written-description/enablement challenges to the priority chain.

Contradiction flagged (date error in the prior-art section): The prior-art section lists US11452327B2 as "Filed January 26, 2018; Published September 27, 2022." The authoritative patent text shows US11452327B2 issued from US 16/246,935, filed January 14, 2019, with a 2018‑01‑26 priority claim. The "filing date" in the prior-art section is the priority date, not the filing date. This matters because the entire § 102(a)(2) analysis for that reference depends on it.

---

IV. Primary obviousness combinations

Combination 1 (lead theory): Thayer + Wilcox '722 + Lueck, optionally + Milioto

Thayer, US4521831A is the closest structural reference to the receptacle architecture of claim 1 and is completely pre-dating. It discloses a plastic protective helmet with base members 25 affixed to the shell, each base having "a pair of parallel grooves 34—34… vertically extended in opposite side walls 35 and 36" forming a slide mechanism that receives a carriage 26; the lamp is thereby "easily removed from the helmet." Vertical travel is arrested by hub 48 abutting the top surface 37 of the receiving base — i.e., a stop. Retention is by a key-slot 45 / rotating-head lock (a releasable clip-type engagement). That maps onto claim 1 limitations 1.2, 1.4 and 1.5 (slots flanked by walls, alignment by slot, retention, a stop, releasable locking), and Thayer discloses two such assemblies (lamp assemblies 15—15).

Wilcox, US20130086722A1 / US8908389B2 discloses a helmet having connectors at different locations on the same shell — "a front connector 140, a rear connector 160, and left and right side connectors 180" — each with a cover having an aperture exposing electrical contacts and "one or more mechanical fasteners configured to removably and securely hold a helmet accessory… in electrical contact." Its companion, US20140020159A1, expressly frames the problem: internally routed harnesses can be damaged and penetrating the shell "compromis[es] the antiballistic properties" — a stated, explicit motivation to place mounting and electrical interfaces at multiple exterior shell locations without destructive fastening.

Lueck, US1947786A supplies the reversible helmet (front or rear side above the face), which is the stated purpose in the '265 specification for duplicating the mount — though, as noted, not a claim limitation.

Milioto, US20110113529A1 (clip for headwear) and US5026016A (retainer clip) supply the "accessory device includes a clip" element and the general snap/clip-on-headwear expedient; US6811348B1 (Thales) supplies a two-part releasable lock of a mobile part to a fixed part (useful for the "protruding member engages the clip" snap-fit).

Result: Claim 1 appears obvious over Thayer in view of Wilcox '722/'159 and Lueck, further in view of Milioto or Helm Products.

Combination 2: Wilcox '722 + Thayer + Lueck (alternative framing)

Where a challenger prefers not to rely on Thayer as primary (because Thayer's base member 25 is adhesively bonded, not "integrally molded"), Wilcox can be the primary reference for "front receptacle… rear receptacle on the exterior surface of the outer shell of a molded helmet," and Thayer is cited for the specific "receiver slot flanked by raised walls" geometry and the arresting stop. The combination is the same in substance.

Combination 3: Milwaukee US11019870B2 (Hyma) — powerful but date-blocked

US11019870B2 is, on its face, devastatingly close to claim 1: "A hard hat with symmetric front and back mounting ridges to support a headlamp… mounting ridges to receive insertion slots of a rigid mounting bracket… clips may be added to the rigid mounting bracket to secure or lock the bracket in place… The clip locks into a recess of the mounting ridge… the rigid mounting bracket interchangeably mounts to either the front or rear mounting ridge." Figures 1–2 even depict the hat "worn with the brim facing forward" and "worn with the brim facing backward." Its claims 9–20 recite a snap fastener positioned between the bracket ends that engages a detent on the ridge.

However, US11019870B2 claims priority to provisional 62/770,466 filed November 21, 2018 — ~10 months after the '265 patent's January 26, 2018 priority date. It is therefore not § 102(a)(1) art and not § 102(a)(2) art (it is not "effectively filed" before the effective filing date). The same date problem affects the Milwaukee continuations US2023/0157398 and US2024/0306753 (front/rear-mount, dovetail/detent/snap-fastener hard hats), which post-date the priority date by years.

Strategic inference (flagged as inference, not verified record): If the January 26, 2018 priority claim is sustained, US11019870B2 and its continuations are unusable against the '265 patent — which would explain why PGR2025‑00080 was built on the patent's own family documents and § 112 grounds rather than on Milwaukee's own, structurally near-identical hard-hat mount. Conversely, if the priority claim is broken (e.g., if the '265 claims 1–4 lack § 112 written-description support in the 2018 provisionals for the "pair of external slots + integrally molded stop + clip" architecture), then the effective date moves to 2022‑07‑01 and references such as US11019870B2, US2023/0157398, US2024/0306753, US11937660B2, and US20240081459A1 all become available — and the § 103 case becomes far stronger. This priority determination is the single highest-leverage issue in the file.

Combination 4: Hmount US20180192727A1 + Lueck + Milioto

Hmount discloses helmet mounting units "made of strong materials (e.g., thermoplastic polymers…)" carrying "a plurality of helmet accessories," with rails, grips and connectors, and expressly addressing the need for "locations and connecting means at which to attach various accessories onto a single helmet." Its filing date is 2017‑01‑10 but its publication date is 2018‑07‑12 — after the 2018‑01‑26 priority date — so it is only available if the priority claim fails. If it is available, it is a strong secondary reference on the "common material / plastic" and multi-accessory points.

---

V. Dependent claims 2–4

Claim 2 ("outer shell, front receptacle, and rear receptacle… formed from a common material") and Claim 3 ("the common material is plastic"):

• The '265 specification itself states that the accessory slots 6, brim 7, venting holes 8, and receiver slot 11 are "unitary features of the outer shell… integrally molded… from a common material such as plastic."
• US20020116749A1 (protective helmet and method of making same) and US20180192727A1 (thermoplastic mounting units) teach shell-and-mount common-material construction. Thayer expressly teaches a base section "molded of a plastic material." Hard hats in 2018 were overwhelmingly injection-molded thermoplastic (HDPE/ABS). Integrating the mount into the molded shell is the predictable, cost-driven variation KSR contemplates, and Wilcox supplies the motivation (avoid separate penetrating fasteners that degrade shell integrity). Claims 2–3 are highly vulnerable.

Claim 4 (second accessory device, second mating receptacle, releasably mountable onto either receptacle):

• Thayer discloses two lamp assemblies of identical construction; Wilcox '722 discloses front, rear, and side connectors, each holding an accessory; US20140020159A1 discloses front 140 and rear 160 connectors with a power supply at one and a device at the other. Motivation: backup/redundancy, weight-balancing, and mixed-function accessories — the same rationale the '265 specification recites (headlamp + battery pack, speaker, camera, GPS tag). Claim 4 is vulnerable on the same record as claim 1.

---

VI. Motivation to combine — the enumerated rationales

A challenger should plead these affirmatively (MPEP § 2145 / KSR):

1. Duplication of parts (MPEP § 2144.04(VII)). Duplicating a front mount at the rear is the paradigm "arrangement of parts" case — the '265 patent claims no synergy between the two receptacles beyond the ability to use one accessory at either location.
2. Predictable variation / known technique. Slide-in receivers with side rails and a detent/stop were a known, routinely used helmet- and rail-mount technique (Thayer 1985; Wilcox; Picatinny-rail interfaces in US20140020159A1's rail section 182).
3. Explicit industry recognition that users wear hard hats backwards. This is stated in the art itself — US11019870B2's Figures 1–2 and specification ("because some users wear hard hats backwards (e.g., so the bill of the hard hat does not interfere with visibility), mounting locations may be added on the front and the back"). Even though that document is date-blocked, it is evidence of what a POSITA knew, and the same teaching appears in pre-2018 art (e.g., US20130086722A1's front/rear connectors).
4. Design incentive to remove weight from the front and balance the shell — the exact problem the '265 specification's own Background recites ("headlamps with integrated power sources tend to pull the helmet down, especially when the wearer is looking down").
5. Avoiding elastic-band mounting, which the '265 Background criticizes (slipping, oil infiltration, constant readjustment) — a stated motivation for a positive, mechanical receptacle.
6. Avoiding destructive mounting, which Wilcox states compromises shell integrity — a motivation to integrally mold the receiving features into the molded shell (supports the "integrally molded stop" limitation and claims 2–3).
7. Safety/visibility rationale for a rear-mounted illumination or signaling device (Thayer's rearward-directed beams; US20120320569A1 warning lamp assembly), supplying the reason to provide a functioning rear receptacle, not a mere blank.

Reasonable expectation of success is easily shown: every element is a conventional mechanical interface (slot + rail + snap/clip + detent) implemented in molded thermoplastics, with no unpredictable technology in the combination.

---

VII. Cross-reference: contradictions with the previously generated sections

Per the operating rule to flag contradictions explicitly, three items require correction:

1. Nature of the PGR2025‑00080 denial. The PTAB section characterizes the denial as a merits-adjacent decision ("concluding that the Petitioner had not demonstrated a reasonable likelihood that at least one of the challenged claims is unpatentable… primarily related to the construction of claim terms and the sufficiency of the prior art arguments"). The Darts/docket record instead shows "Board Director Discretionary Decision: Deny," with the Patent Owner's exhibits being ITC orders, the USPTO's March 26, 2025 workload‑management memorandum, the March 24, 2025 rescission guidance, and a domestic‑industry claim chart — i.e., Fintiv/§ 324(a)‑style discretionary denial tied to a parallel ITC investigation, not a merits win. That distinction is outcome-determinative for strategy: a discretionary denial carries no § 103 weight whatsoever and should not be cited as evidence of nonobviousness. (docketalarm PGR2025‑00080)
2. Denial date and panel. The PTAB section states the denial issued 2026‑03‑06 before APJs Tierney, Murphy, and Reed. The docket shows termination on 2026‑02‑03 by a Board Director Discretionary Decision. One of these is wrong; the docket-timestamped entry should be preferred absent the actual paper. Also, the prior sections describe the PTAB's reasoning in some detail — I could not verify any merits reasoning, and no merits reasoning should be assumed from a discretionary denial.
3. Omitted parallel litigation. The Litigation and Strategic summaries state that, apart from PGR2025‑00080, there are "no active proceedings." The PGR record references ITC Investigation No. 337‑TA‑1442, "Certain Glow Fish Tape Systems, Safety Helmet Systems, and Components Thereof," with a Markman hearing held July 23, 2025, a Second Supplemental Hard Hat Domestic Industry Claim Chart, and Milwaukee's interrogatory responses to Klein — indicating a live ITC action over safety helmet systems with Klein as respondent (Milwaukee as complainant, consistent with Milwaukee filing the PGR). A parallel EDTX action stayed pending the ITC is also referenced. This is highly material to the § 103 posture because § 315(e)/§ 325(e) estoppel and any IPR/PGR strategy interact with the ITC schedule — and it is the evident trigger for the Fintiv denial. A related but distinct dispute (Klein Tools v. Milwaukee, IPR2024‑01400/‑01401, relating to US 11,365,026 and US 11,794,952) was denied institution by Acting Director review on June 9, 2025. (Finnegan analysis; Director decision PDF)

---

VIII. Counter-arguments a patent owner will press, and a challenger's rebuttals

---

IX. Bottom line

• Claims 1–4 are, on this record, vulnerable under § 103 to a combination of US4521831A (Thayer) as the primary structural reference for the slot-and-stop receptacle, US20130086722A1 (Wilcox) and US20140020159A1 (Wilcox) for front-and-rear mounting locations on a single molded helmet shell (with the express motivation of avoiding shell-penetrating fasteners), US1947786A (Lueck) for reversibility, and US20110113529A1 (Milioto) and/or US5026016A for the accessory-side clip. Claims 2–3 fall with US20020116749A1 / US20180192727A1 / Thayer's molded plastic base; claim 4 falls with Thayer's two lamp assemblies and Wilcox's multiple connectors.
• The strongest available reference — Milwaukee's US11019870B2 — is date-blocked against the January 26, 2018 priority date, as are its continuations US2023/0157398 and US2024/0306753. The priority/§ 112 support question for claims 1–4 (specifically whether the 2018 provisionals describe the "pair of external slots + integrally molded stop + clip" architecture) is therefore the pivotal issue; if priority fails, the obviousness case strengthens dramatically and these references come into play.
• The claims remain formally untested on the merits. PGR2025‑00080 ended in a discretionary denial tethered to ITC Investigation 337‑TA‑1442, not a merits adjudication, and no estoppel attaches under § 325(e)(2).

Recommended further work (ordered by leverage):

1. Obtain and read the full Decision Denying Institution in PGR2025‑00080 (and confirm the 2026‑02‑03 vs. 2026‑03‑06 date and whether it was a panel or Director decision).
2. Obtain the PGR2025‑00080 petition to see exactly how Milwaukee pleaded the § 112 and priority arguments — that pleading is the best available roadmap for the priority-attack theory.
3. Verify whether U.S. Provisional 62/622,472 (Jan 26, 2018) and 62/645,491 (Mar 20, 2018) actually disclose the two-slot-plus-integral-stop front receptacle and the clip retention.
4. Pull the ITC 337‑TA‑1442 record (Markman order of July 23, 2025, and the domestic-industry claim charts) for the parties' own constructions of "receptacle," "slot," and "stop," which will govern any § 103 analysis.

Uncertainty statement: I could not independently verify the contents of the PGR2025‑00080 petition or institution decision beyond the docket entries and third-party excerpts above; the descriptions of the petition's grounds attributed to the earlier sections should be treated as unverified pending the primary documents.