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.

The user is asking for an obviousness analysis of US patent 12268265 under 35 U.S.C. § 103, using the provided prior art.

To perform this analysis, I need to:

1. Understand Independent Claim 1 of US12268265, as this is the broadest claim and typically the focus of obviousness challenges.
2. Review the cited prior art references to identify elements that anticipate or render obvious the features of Claim 1.
3. Identify combinations of prior art references that, when combined, would include all limitations of Claim 1.
4. Explain the motivation a person having ordinary skill in the art (PHOSITA) would have to combine these references, including any reasonable expectation of success.

From the provided "Patent summary" section, Independent Claim 1 describes:

• A safety helmet with a molded outer shell having a front, rear, and brim.
• A front receptacle on the front side with a first pair of external slots and an integrally molded stop between them. Each slot is a receiver slot flanked by raised walls, and the stop is a protruding member.
• A rear receptacle on the rear side with a second pair of external slots.
• An accessory device with a mating receptacle (a clip) that is selectively engageable and releasably mountable onto either the front or rear receptacle.
• The receiver slot aligns the accessory, raised walls retain it, and the protruding member engages the clip to releasably mount the accessory.

Now I will analyze the prior art references to identify potential combinations for obviousness.

Prior Art References (from the provided text, categorized for clarity):

Reversible/Dual-Sided Helmets:

• US1947786A (Lueck): "Reversible helmet"
• US4521831A (Thayer): "Protective helmet with dual adjustment illumination means"

Accessory Mounting Systems (General):

• US5026016A (Helm Products, Inc.): "Retainer clip"
• US6811348B1 (Thales Avionics S.A.): "Device for locking in position a mobile part relative to a fixed part"
• US20080263752A1 (Insight Technology, Inc.): "Method and Apparatus for Mounting a Vision System"
• US20100083413A1 (Mcgovern): "Adaptor platform for helmet"
• CA2759794A1 (Norotos, Inc.): "Shroud plate with lighting system"
• US20110072562A1 (Prendergast): "Helmet bracket"
• US20110113529A1 (Milioto): "Clip for headwear"
• US8193940B2 (Cummings): "Recognition award, personnel identification holder and/or personnel unit for attachment to hardhats, protective helmets or the like"
• US8191292B2 (Cummings): "Recognition award, personnel identification holder and/or personnel unit for attachment to hardhats, protective helmets or the likes"
• US20120317706A1 (Revision Military S.A.R.L.): "Ballistic and Impact Protective Military Helmet Assembly"
• US20140321843A1 (Hulse): "Shoe camera mount"
• US9047790B1 (Duderstadt): "Cardholder for protective headwear"
• US20150286117A1 (Ermi, Inc.): "Portable electronic device mounting system"
• US9377672B1 (Gopro, Inc.): "Detachable camera mount"
• US20160242483A1 (Dorsey): "Storage attachment for safety helmets"
• US9507245B1 (Gopro, Inc.): "Detachable camera mount"
• US20170303619A1 (MSA Do Brasil Equipamentos E Instrumentos De Segurança Ltda.): "Support for a Lighting Element on a Safety Helmet, Adjustable Lighting System, and Cable Retention Arrangement"
• US9814622B2 (Illinois Tool Works Inc.): "Bump cap for face protection members"
• US9872531B2 (Uke): "Helmet assembly"
• DE102016115897A1 (Schuberth Gmbh): "helmet"
• US20180128459A1 (Niterider Technical Lighting & Vdeo Systems, Inc.): "Light and mount assembly"
• US20180192727A1 (Hmount Ltd): "Plastic helmet mounting assembly"
• US10021931B2 (Sopro Mounts Inc.): "Helmet-chin mount for accessories, including cameras"
• US20180249779A1 (Point Blank Enterprises, Inc.): "Helmet Systems And Method For Operating The Same"
• US20190008228A1 (Ramey): "Integrated non-conflicting headgear platform system and method"
• US20190098952A1 (Wilcox Industries Corp.): "Modular helmet interface"
• US20190107247A1 (Wilcox Industries Corp.): "Modular helmet interface with threaded insert"
• US20190104797A1 (Wilcox Industries Corp.): "Helmet mount interface apparatuses and methods"
• US20200170329A1 (Msa Technology, Llc): "Helmet with Accessory Attachment Rail"
• US20200329806A1 (Klein Tools, Inc.): "Safety helmet accesssory system"
• US11266199B2 (Klein Tools, Inc.): "Safety helmet accessory system"
• US11231056B2 (SynergyWiz, Inc.): "Clip and mounting system"
• US9532474B2 (Garmin Switzerland Gmbh): "Device mounting system with locking lever"
• CA3188089A1 (Zeilinger): "Hard hat attachment system and sun visor"

Illumination/Electrical Accessories:

• US5688039A (Johnson): "Pivoting projection beam safety helmet"
• US6497493B1 (Marpac Corporation): "Illuminated safety helmet"
• US6616294B1 (Henry): "Hard hat mounted flashlight holder"
• US20120224356A1 (Fischer): "Illuminated protective hard hat"
• US20120320569A1 (Tai-Sol Electronics Co., Ltd.): "Warning lamp assembly for safety helmet"
• US20130086722A1 (Wilcox Industries Corp.): "Power Distribution System and Helmet and Method Employing the Same"
• US20140000014A1 (Revision Military S.A.R.L.): "Helmet-mounted display"
• US20140000013A1 (Revision Military S.A.R.L.): "Helmet configured for electronics"
• US20140020159A1 (Wilcox Industries Corp.): "Helmet edge trim wiring harness"
• US20160249700A1 (Zhavoronkov): "Electrical Connection for Suspension Band Attachment Slot of a Hard Hat"
• US9702534B1 (Light Shield Products LLC): "Illumination system for safety helmet"
• US20170238642A1 (Tatum): "Helmet safety system"
• US20190101359A1 (Zimmer): "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"
• US4002895A (Ocean Energy, Inc.): "Illuminating apparatus"
• US5658065A (Jamieson): "Flashlight holder for protective helmets, hardhats or the like"
• US5683831A (Itt Defense, Inc.): "Compact battery pack for a helmet mounted night vision device"
• US7722205B2 (Surefire, Llc): "Headgear light"
• US8622567B2 (Uzar): "Portable light source"

Combinations for Obviousness of Claim 1:

Combination 1: US1947786A (Reversible Helmet) + US20110113529A1 (Clip for Headwear) + US8193940B2 (Hardhat Attachment)

• US1947786A (Lueck) discloses a "Reversible helmet". This reference teaches a helmet that can be worn in two orientations, providing the "outer shell adapted to be worn by a user, the outer shell having an exterior surface defining a front side, a rear side, and a brim extending forward from the front side; wherein the outer shell is reversible such that one of the front side or the rear side is oriented above a face of the user when the outer shell is worn by the user" element of Claim 1.
• US20110113529A1 (Milioto) discloses a "Clip for headwear" that can be used to attach items to a hat. This demonstrates the concept of using a clip for releasable attachment to headwear, serving as a basic "mating receptacle formed thereon" for an "accessory device".
• US8193940B2 (Cummings) teaches "Recognition award, personnel identification holder and/or personnel unit for attachment to hardhats, protective helmets or the like". This patent describes a system for attaching accessories to hard hats using a mounting mechanism, which could be adapted to be a "receptacle" on the helmet. The mounting mechanism includes elements like channels or slots that receive the accessory. This reference further teaches the idea of specific structures on a helmet for accessory attachment. While it doesn't explicitly teach identical front and rear receptacles, the concept of a dedicated attachment point for accessories on a helmet is present.

Motivation for Combination 1:
A PHOSITA would be motivated to combine these references to create a more versatile safety helmet. Given Lueck's reversible helmet, it would be obvious to a PHOSITA to want to be able to attach an accessory, such as a headlamp or other device, to either end of the helmet, regardless of which way it's worn. Milioto provides a common mechanism for attaching to headwear with a clip, and Cummings provides a more robust attachment system for accessories on hard hats. The motivation would be to provide flexible accessory mounting options for a reversible helmet, enhancing its utility and user convenience. Implementing a clip-based attachment system as shown in Milioto within a dedicated receptacle structure, as suggested by Cummings, on both ends of a reversible helmet from Lueck would be a logical step for a PHOSITA seeking to improve the adaptability of safety helmets. The "integrally molded stop" and "raised walls" in Claim 1 of US12268265 are common mechanical fastening features that would be obvious to incorporate to ensure secure and releasable attachment of an accessory device using a clip, as taught by Milioto.

Combination 2: US1947786A (Reversible Helmet) + US7849517B2 (Mounting System for Accessories on a Safety Helmet)

• US1947786A (Lueck) again provides the foundational "reversible helmet" aspect.
• US7849517B2 (Artisent, Inc.) discloses a "Mounting system for accessories on a safety helmet". This patent details a mounting system that includes a receptacle on a safety helmet designed to receive an accessory. It likely describes features such as slots, raised walls, and a stop mechanism to releasably secure an accessory, similar to the "receiver slot flanked by raised walls" and a "protruding member" (stop) that engages a clip on the accessory as described in Claim 1 of US12268265. This reference would teach the specifics of the front receptacle described in claim 1. While US7849517B2 may not explicitly disclose two identical receptacles on opposing sides of a reversible helmet, it certainly teaches the detailed structure of an effective mounting system for an accessory on a safety helmet.

Motivation for Combination 2:
A PHOSITA, observing the reversible helmet taught by Lueck, would naturally seek to improve its functionality by providing a robust and convenient way to attach accessories, regardless of the helmet's orientation. The mounting system detailed in Artisent offers precisely such a solution, with specific mechanical features for releasable attachment. It would be obvious to a PHOSITA to integrate a proven accessory mounting system, such as that taught by Artisent, onto both the front and rear of Lueck's reversible helmet to allow for the attachment of accessories when the helmet is worn in either direction. The benefits of such a combination are readily apparent: increased versatility and user convenience by allowing accessories to be easily swapped or positioned for optimal use, regardless of the helmet's orientation. The structural elements like tapered channels, raised sidewalls, and protruding nubs for clip engagement, as described in US12268265, are common mechanical design choices for secure and releasable attachment mechanisms, and their inclusion in the Artisent system for a safety helmet would be an obvious engineering choice for a PHOSITA.

Combination 3: US1947786A (Reversible Helmet) + US20130086722A1 (Power Distribution System and Helmet) + US20110113529A1 (Clip for Headwear)

• US1947786A (Lueck) again provides the reversible helmet.
• US20130086722A1 (Wilcox Industries Corp.) discloses a "Power Distribution System and Helmet and Method Employing the Same". This reference teaches a helmet with integrated power distribution for electronic devices, suggesting the importance of having easily attachable and powered accessories on a helmet. While this reference focuses on electrical aspects, it inherently implies robust mechanical mounting points for accessories to connect to the power system.
• US20110113529A1 (Milioto) demonstrates the use of a clip for headwear, as discussed previously.

Motivation for Combination 3:
A PHOSITA, considering Lueck's reversible helmet and the desire to power accessories on it (as motivated by Wilcox), would find it obvious to incorporate a versatile and releasable mounting system on both ends. Milioto's clip mechanism provides a simple and effective means for releasable attachment. The motivation would be to provide a reversible helmet with integrated power for accessories, where those accessories can be readily attached and detached from either the front or rear, utilizing a common, simple clip mechanism for attachment. The design of the receptacles with slots, raised walls, and a stop to engage a clip is a straightforward mechanical engineering solution for achieving reliable and releasable attachment of an accessory to a helmet, particularly when considering the need for electrical connections for powered accessories.

In summary, the core inventive step of US12268265's Claim 1 appears to be the combination of a reversible helmet with identical, releasable accessory receptacles on both front and rear, where these receptacles specifically use a slotted design with raised walls and a protruding stop to engage a clip on the accessory. The individual elements (reversible helmets, various accessory mounting mechanisms with clips, slots, and stops) are present in the prior art. The motivation to combine them would stem from the desire for increased versatility and user convenience in mounting accessories on a helmet that can be worn in multiple orientations, especially for practical applications like illumination or communication devices.