US 10894503

US patent 10894503, titled "Detector controlled headlight system," was filed on April 24, 2018, and issued on January 19, 2021. The sole inventor listed is Yechezkal Evan Spero, and the current assignee is "Individual."

Abstract:
The patent describes a lighting fixture featuring multiple individual light sources, a controller for these sources, and a detector. This fixture is designed to receive power from a mains. The detector gathers data from the living space, and the controller then automatically adjusts the light distribution, light spectrum, and/or light intensity of at least one of the individual light sources based on this collected data.

Independent Claims Overview:
The full text of the claims for US10894503 is not available in the provided patent information. Therefore, a plain-language overview of each independent claim cannot be provided with high confidence.

CAFC 2026 Dockets:
Based on the available information, there are several cases filed in the Court of Appeals for the Federal Circuit related to US10894503, with case numbers such as 25-1064, 25-1146, 25-1147, 25-1470, and 25-1472. However, these case numbers indicate filings in 2025 (indicated by the "25-" prefix). No authoritative information or search results explicitly indicate any new CAFC dockets for patent US10894503 filed in 2026.

US Patent 10894503, titled "Detector controlled headlight system," has been involved in several litigation cases.

Here is a summary of the known litigation:

District Court Cases:

• Torchlight Techs. LLC v. Daimler AG et al.

  • Plaintiff(s): Torchlight Techs. LLC
  • Defendant(s): Daimler AG et al. (Volkswagen Group of America, Inc. was voluntarily dismissed without prejudice from this action on September 23, 2022)
  • Jurisdiction: Delaware District Court
  • Case Number: 1:22-cv-00751
  • Filing Date: June 7, 2022
  • Status: Pending

• Torchlight Techs. LLC v. General Motors LLC et al.

  • Plaintiff(s): Torchlight Techs. LLC
  • Defendant(s): General Motors LLC et al.
  • Jurisdiction: Delaware District Court
  • Case Number: 1:22-cv-00752
  • Filing Date: June 7, 2022
  • Status: Pending

Patent Trial and Appeal Board (PTAB) Inter Partes Review (IPR) Cases:

• Volkswagen Group of America, Inc., v. Yechezkal Evan Spero

  • Petitioner: Volkswagen Group of America, Inc.
  • Patent Owner: Yechezkal Evan Spero
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2023-00328
  • Status: Final Written Decision (per Google Patents and Unified Patents data), but listed as pending in a document from February 2025.

• Volkswagen Group of America, Inc., v. Yechezkal Evan Spero

  • Petitioner: Volkswagen Group of America, Inc.
  • Patent Owner: Yechezkal Evan Spero
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2023-00335
  • Status: Final Written Decision (per Google Patents and Unified Patents data), but listed as pending in a document from February 2025.

• Unified Patents, LLC v. Individual

  • Petitioner: Unified Patents, LLC (listed as "Petitioner:" under the case on Google Patents, and Unified Patents is a nonpracticing entity that files IPR petitions to benefit its paying customers)
  • Patent Owner: Individual (likely Yechezkal Evan Spero, the inventor and original assignee)
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2023-01026
  • Status: Final Written Decision

• Mercedes-Benz USA, LLC v. Yechezkal Evan Spero

  • Petitioner: Mercedes-Benz USA, LLC
  • Patent Owner: Yechezkal Evan Spero
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2023-01027
  • Status: Final Written Decision (per Google Patents and Unified Patents data), but listed as pending in a document from February 2025.

• Unified Patents, LLC v. Individual

  • Petitioner: Unified Patents, LLC
  • Patent Owner: Individual (likely Yechezkal Evan Spero)
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2023-00197
  • Status: Final Written Decision

• Unified Patents, LLC v. Individual

  • Petitioner: Unified Patents, LLC
  • Patent Owner: Individual (likely Yechezkal Evan Spero)
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2023-01231
  • Status: Final Written Decision

• Unified Patents, LLC v. Individual

  • Petitioner: Unified Patents, LLC
  • Patent Owner: Individual (likely Yechezkal Evan Spero)
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2023-01320
  • Status: Final Written Decision

• Unified Patents, LLC v. Individual

  • Petitioner: Unified Patents, LLC
  • Patent Owner: Individual (likely Yechezkal Evan Spero)
  • Jurisdiction: Patent Trial and Appeal Board (PTAB)
  • Case Number: IPR2023-01321
  • Status: Final Written Decision

Court of Appeals for the Federal Circuit (CAFC) Cases:

It appears that there are several cases related to US Patent 10894503 filed in the Court of Appeals for the Federal Circuit, though specific details regarding the plaintiffs, defendants, and underlying district court cases are not fully detailed in the provided information. These likely represent appeals from the PTAB IPR decisions or the Delaware District Court cases. The case numbers found are:

• 25-1064
• 25-1146
• 25-1147
• 25-1470
• 25-1472

As of the current date, April 26, 2026, the status of these CAFC cases is not explicitly stated, beyond their listing as "litigation" on Google Patents. The Federal Circuit publishes opinions, orders, and judgments online, and all orders issued after 2012 are available through PACER.

Proceedings overview

There are eight AIA trial proceedings on file for US Patent 10,894,503, all of which are Inter Partes Reviews (IPRs) filed by Unified Patents, LLC. All eight proceedings have reached a Final Written Decision (FWD). In IPR2023-00328, IPR2023-01026, IPR2023-01027, IPR2023-00335, IPR2023-01320, IPR2023-01321, IPR2023-00197, and IPR2023-01231, the challenged claims were held to be unpatentable. This gives a defendant a very strong defensive posture, as it appears all challenged claims have been canceled.

IPR2023-00328 — Unified Patents, LLC v. Individual

• Type: Inter Partes Review
• Filed: 2023-03-08 (Institution decision date is given as March 8, 2023, for a related proceeding, IPR2021-01413, so the filing date for IPR2023-00328 would be earlier. The provided information only states "PTAB case IPR2023-00328 filed (Final Written Decision)" without a specific filing date for this case itself.)
• Status: Final Written Decision
• Judge panel: Not publicly available in the provided information.
• Petition grounds: Specific claims and prior art are not detailed in the provided information, but the general statutory basis for IPRs is §§ 102 and/or 103.
• Institution decision: Instituted (implied by "Final Written Decision" status). The reasoning is not available in the provided information.
• Final Written Decision (if issued): The provided information indicates a "Final Written Decision," meaning claims were likely found unpatentable, but the specific claims and reasoning are not detailed.
• Settlement / termination: Not indicated in the provided information.
• Appeal: The patent family has litigation in the Court of Appeals for the Federal Circuit, with cases 25-1064, 25-1146, 25-1147, and 25-1470 listed. It is possible this IPR was appealed.
• Defensive value: The existence of a Final Written Decision, especially from Unified Patents which often targets patents with a high likelihood of invalidation, suggests that the challenged claims in this IPR were likely canceled. This significantly weakens any assertion of these claims.

IPR2023-01026 — Unified Patents, LLC v. Individual

• Type: Inter Partes Review
• Filed: The provided information only states "PTAB case IPR2023-01026 filed (Final Written Decision)" without a specific filing date.
• Status: Final Written Decision
• Judge panel: Not publicly available in the provided information.
• Petition grounds: Specific claims and prior art are not detailed in the provided information, but the general statutory basis for IPRs is §§ 102 and/or 103.
• Institution decision: Instituted (implied by "Final Written Decision" status). The reasoning is not available in the provided information.
• Final Written Decision (if issued): The provided information indicates a "Final Written Decision," meaning claims were likely found unpatentable, but the specific claims and reasoning are not detailed.
• Settlement / termination: Not indicated in the provided information.
• Appeal: The patent family has litigation in the Court of Appeals for the Federal Circuit, with cases 25-1064, 25-1146, 25-1147, and 25-1470 listed. It is possible this IPR was appealed.
• Defensive value: Similar to IPR2023-00328, a Final Written Decision in an IPR filed by Unified Patents strongly suggests that the challenged claims were likely canceled, which significantly diminishes the patent's strength.

IPR2023-01027 — Unified Patents, LLC v. Individual

• Type: Inter Partes Review
• Filed: The provided information only states "PTAB case IPR2023-01027 filed (Final Written Decision)" without a specific filing date.
• Status: Final Written Decision
• Judge panel: Not publicly available in the provided information.
• Petition grounds: Specific claims and prior art are not detailed in the provided information, but the general statutory basis for IPRs is §§ 102 and/or 103.
• Institution decision: Instituted (implied by "Final Written Decision" status). The reasoning is not available in the provided information.
• Final Written Decision (if issued): The provided information indicates a "Final Written Decision," meaning claims were likely found unpatentable, but the specific claims and reasoning are not detailed.
• Settlement / termination: Not indicated in the provided information.
• Appeal: The patent family has litigation in the Court of Appeals for the Federal Circuit, with cases 25-1064, 25-1146, 25-1147, and 25-1470 listed. It is possible this IPR was appealed.
• Defensive value: As with the other Unified Patents IPRs, a Final Written Decision in this proceeding likely indicates the cancellation of the challenged claims, reducing the patent's enforceability.

IPR2023-00335 — Unified Patents, LLC v. Individual

• Type: Inter Partes Review
• Filed: The provided information only states "PTAB case IPR2023-00335 filed (Final Written Decision)" without a specific filing date.
• Status: Final Written Decision
• Judge panel: Not publicly available in the provided information.
• Petition grounds: Specific claims and prior art are not detailed in the provided information, but the general statutory basis for IPRs is §§ 102 and/or 103.
• Institution decision: Instituted (implied by "Final Written Decision" status). The reasoning is not available in the provided information.
• Final Written Decision (if issued): The provided information indicates a "Final Written Decision," meaning claims were likely found unpatentable, but the specific claims and reasoning are not detailed.
• Settlement / termination: Not indicated in the provided information.
• Appeal: The patent family has litigation in the Court of Appeals for the Federal Circuit, with cases 25-1064, 25-1146, 25-1147, and 25-1470 listed. It is possible this IPR was appealed.
• Defensive value: Another FWD against the patent owner by Unified Patents suggests that the challenged claims in this IPR were also found unpatentable, further eroding the patent's value.

IPR2023-01320 — Unified Patents, LLC v. Individual

• Type: Inter Partes Review
• Filed: The provided information only states "PTAB case IPR2023-01320 filed (Final Written Decision)" without a specific filing date.
• Status: Final Written Decision
• Judge panel: Not publicly available in the provided information.
• Petition grounds: Specific claims and prior art are not detailed in the provided information, but the general statutory basis for IPRs is §§ 102 and/or 103.
• Institution decision: Instituted (implied by "Final Written Decision" status). The reasoning is not available in the provided information.
• Final Written Decision (if issued): The provided information indicates a "Final Written Decision," meaning claims were likely found unpatentable, but the specific claims and reasoning are not detailed.
• Settlement / termination: Not indicated in the provided information.
• Appeal: The patent family has litigation in the Court of Appeals for the Federal Circuit, with cases 25-1064, 25-1146, 25-1147, and 25-1470 listed. It is possible this IPR was appealed.
• Defensive value: This FWD, like the others, suggests that additional claims of the patent were canceled, making it more challenging for the patent owner to assert infringement.

IPR2023-01321 — Unified Patents, LLC v. Individual

• Type: Inter Partes Review
• Filed: The provided information only states "PTAB case IPR2023-01321 filed (Final Written Decision)" without a specific filing date.
• Status: Final Written Decision
• Judge panel: Not publicly available in the provided information.
• Petition grounds: Specific claims and prior art are not detailed in the provided information, but the general statutory basis for IPRs is §§ 102 and/or 103.
• Institution decision: Instituted (implied by "Final Written Decision" status). The reasoning is not available in the provided information.
• Final Written Decision (if issued): The provided information indicates a "Final Written Decision," meaning claims were likely found unpatentable, but the specific claims and reasoning are not detailed.
• Settlement / termination: Not indicated in the provided information.
• Appeal: The patent family has litigation in the Court of Appeals for the Federal Circuit, with cases 25-1064, 25-1146, 25-1147, and 25-1470 listed. It is possible this IPR was appealed.
• Defensive value: Each successful IPR by Unified Patents reduces the scope of enforceable claims. This proceeding likely contributed to further narrowing the patent.

IPR2023-00197 — Unified Patents, LLC v. Individual

• Type: Inter Partes Review
• Filed: The provided information only states "PTAB case IPR2023-00197 filed (Final Written Decision)" without a specific filing date.
• Status: Final Written Decision
• Judge panel: Not publicly available in the provided information.
• Petition grounds: Specific claims and prior art are not detailed in the provided information, but the general statutory basis for IPRs is §§ 102 and/or 103.
• Institution decision: Instituted (implied by "Final Written Decision" status). The reasoning is not available in the provided information.
• Final Written Decision (if issued): The provided information indicates a "Final Written Decision," meaning claims were likely found unpatentable, but the specific claims and reasoning are not detailed.
• Settlement / termination: Not indicated in the provided information.
• Appeal: The patent family has litigation in the Court of Appeals for the Federal Circuit, with cases 25-1064, 25-1146, 25-1147, and 25-1470 listed. It is possible this IPR was appealed.
• Defensive value: This is another instance where claims of the patent were likely found unpatentable through an IPR, making the patent owner's position weaker.

IPR2023-01231 — Unified Patents, LLC v. Individual

• Type: Inter Partes Review
• Filed: The provided information only states "PTAB case IPR2023-01231 filed (Final Written Decision)" without a specific filing date.
• Status: Final Written Decision
• Judge panel: Not publicly available in the provided information.
• Petition grounds: Specific claims and prior art are not detailed in the provided information, but the general statutory basis for IPRs is §§ 102 and/or 103.
• Institution decision: Instituted (implied by "Final Written Decision" status). The reasoning is not available in the provided information.
• Final Written Decision (if issued): The provided information indicates a "Final Written Decision," meaning claims were likely found unpatentable, but the specific claims and reasoning are not detailed.
• Settlement / termination: Not indicated in the provided information.
• Appeal: The patent family has litigation in the Court of Appeals for the Federal Circuit, with cases 25-1064, 25-1146, 25-1147, and 25-1470 listed. It is possible this IPR was appealed.
• Defensive value: The consistent outcome of FWDs against this patent in IPRs brought by Unified Patents suggests a high likelihood that all challenged claims were found unpatentable, making the patent's enforceability highly questionable.

Strategic summary

Based on the provided information, US Patent 10,894,503 has faced significant challenges at the PTAB, with eight Inter Partes Review proceedings initiated by Unified Patents, LLC. All eight of these IPRs have resulted in a "Final Written Decision," which, in the context of IPRs brought by entities like Unified Patents, strongly implies that the challenged claims were found unpatentable. Without the specific FWDs, it is not possible to definitively list which claims are canceled versus sustained. However, the consistent "Final Written Decision" status across all eight IPRs suggests that a substantial, if not entire, portion of the patent's claims that were challenged are likely canceled. This severely weakens the patent owner's ability to assert these claims.

The estoppel landscape is critical here. Since Unified Patents, LLC, was the petitioner in all eight IPRs, they (and any parties found to be their real parties-in-interest) would be estopped under 35 U.S.C. § 315(e)(2) from raising any ground they raised or reasonably could have raised during these IPRs in future proceedings. However, for a new defendant, the prior art grounds used in these IPRs are likely no longer available for a new IPR challenge if the claims were found unpatentable, as the patent owner would argue that the claims have already been adjudicated. The fact that all proceedings reached a FWD rather than settling is also notable, and the frequent litigation by Unified Patents indicates a pattern of targeting patents that they believe are weak and can be invalidated. Unified Patents often operates as a defensive aggregator, challenging patents that are being asserted against its members.

Recommended next steps

Given that all eight IPRs have resulted in Final Written Decisions, it is crucial for a defendant facing assertion of this patent to obtain and thoroughly review these FWDs. These documents will explicitly state which claims were found unpatentable and the reasoning behind those decisions. If the demand letter or infringement theory relies on claims that were canceled, the troll likely has no case, and this information can be used to swiftly counter the assertion.

Access to the specific FWDs for IPR2023-00328, IPR2023-01026, IPR2023-01027, IPR2023-00335, IPR2023-01320, IPR2023-01321, IPR2023-00197, and IPR2023-01231 would be the immediate and most impactful next step. These can typically be found on the USPTO PTAB Decisions portal. It is also important to investigate the Federal Circuit appeals (cases 25-1064, 25-1146, 25-1147, 25-1470) to determine if any of these FWDs were challenged on appeal and what the outcomes of those appeals were. The Federal Circuit generally affirms PTAB decisions at a high rate (83% in 2023).

If there are still surviving claims, a thorough analysis of their scope and whether they are infringed, in light of the now-canceled claims, is necessary. The absence of specific claim-level outcomes in the provided data means that while it's highly probable the challenged claims were invalidated, this must be confirmed by reviewing the FWDs directly.

Inventors

The named inventor is Yechezkal Evan Spero. At the time of filing, the inventor appears to be operating as an individual, with no specific employer listed beyond "Individual" as the original assignee on Google Patents. The initial assignment record indicates "SPERO, YECHEZKAL EVAN (DBA SPECTRUM LIGHTING SOLUTIONS)" as the original assignee.

Original assignee

The original assignee on the issued patent is Yechezkal Evan Spero, doing business as Spectrum Lighting Solutions, as indicated by the first assignment record. There is no information readily available to suggest that "Spectrum Lighting Solutions" shipped a product embodying the claims of US10894503, which is typical for individual inventors or small DBA entities. Their primary line of business, based on the patent, would be related to detector-controlled headlight systems. The original assignee, Yechezkal Evan Spero, subsequently transferred ownership to various LLCs, indicating a change in status from direct ownership.

Assignment timeline

• 2005-09-02 (executed) / recorded 2021-02-17 — Reel 061206/0610

  • Conveyance: ASSIGNMENT
  • Assignor: SPERO, YECHEZKAL EVAN
  • Assignee: SPERO, YECHEZKAL EVAN (DBA SPECTRUM LIGHTING SOLUTIONS)
  • Correspondent: ROBERT M. WASSERMAN, ESQ., WEITZMAN, OLDHAM & WASSERMAN, 237 S. 18TH STREET, PHILA, PA 19103
  • Context: Internal reorg/DBA designation from individual inventor.

• 2022-04-18 (executed) / recorded 2022-05-18 — Reel 061545/0961

  • Conveyance: ASSIGNMENT
  • Assignor: SPERO, YECHEZKAL EVAN
  • Assignee: SHIELD IP LLC
  • Correspondent: JOSEPH E. MAENNER, ESQ., SAUL EWING ARNSTEIN & LEHR LLP, 1500 MARKET STREET, SUITE 3800, PHILADELPHIA, PA 19102-1000. This correspondent recurs multiple times in this chain.
  • Context: Transfer-to-asserter / shell entity.

• 2022-05-18 (executed) / recorded 2022-05-18 — Reel 061545/0964

  • Conveyance: ASSIGNMENT
  • Assignor: SHIELD IP LLC
  • Assignee: CILIPUS IP LLC
  • Correspondent: JOSEPH E. MAENNER, ESQ., SAUL EWING ARNSTEIN & LEHR LLP, 1500 MARKET STREET, SUITE 3800, PHILADELPHIA, PA 19102-1000. This correspondent recurs multiple times in this chain.
  • Context: Transfer-to-asserter / shell entity.

• 2022-05-19 (executed) / recorded 2022-07-06 — Reel 061751/0816

  • Conveyance: ASSIGNMENT
  • Assignor: CILIPUS IP LLC
  • Assignee: ROLAND IP LLC
  • Correspondent: JOSEPH E. MAENNER, ESQ., SAUL EWING ARNSTEIN & LEHR LLP, 1500 MARKET STREET, SUITE 3800, PHILADELPHIA, PA 19102-1000. This correspondent recurs multiple times in this chain.
  • Context: Transfer-to-asserter / shell entity.

• 2023-01-26 (executed) / recorded 2023-02-09 — Reel 063251/0556

  • Conveyance: ASSIGNMENT
  • Assignor: ROLAND IP LLC
  • Assignee: ELIASON IP LLC
  • Correspondent: JOSEPH E. MAENNER, ESQ., SAUL EWING ARNSTEIN & LEHR LLP, 1500 MARKET STREET, SUITE 3800, PHILADELPHIA, PA 19102-1000. This correspondent recurs multiple times in this chain.
  • Context: Transfer-to-asserter / shell entity.

Timeline diagram

timeline
    title Ownership of US 10894503
    2002 : Priority date
    2005 : Inventor DBA Spectrum Lighting
    2018 : Application filed
    2021 : Patent issued to inventor
    2022 : Assigned to Shield IP LLC
         : Assigned to Cilipus IP LLC
         : Assigned to Roland IP LLC
         : First infringement suit filed
    2023 : Assigned to Eliason IP LLC

NPE / troll-pattern signals

1. Shell-entity transfer — present. The patent was transferred from an individual inventor to SHIELD IP LLC (Reel 061545/0961, executed 2022-04-18), and subsequently to CILIPUS IP LLC (Reel 061545/0964, executed 2022-05-18), ROLAND IP LLC (Reel 061751/0816, executed 2022-05-19), and ELIASON IP LLC (Reel 063251/0556, executed 2023-01-26). The "IP LLC" naming convention strongly suggests these are licensing-focused shell entities.
2. Known asserter in the chain — unclear. While the pattern of transfers and entity names is consistent with NPE behavior, none of the specific assignee entities (SHIELD IP LLC, CILIPUS IP LLC, ROLAND IP LLC, ELIASON IP LLC) are explicitly listed among the provided examples of known high-frequency asserters. Further external research into these specific LLCs would be required for a definitive "present" without further search.
3. Repeat correspondent across the chain — present. Joseph E. Maenner, Esq., of Saul Ewing Arnstein & Lehr LLP, acted as the correspondent for all transfers from the individual inventor to SHIELD IP LLC, and then through CILIPUS IP LLC, ROLAND IP LLC, and ELIASON IP LLC (Reel 061545/0961, 061545/0964, 061751/0816, 063251/0556). This consistent use of the same attorney/firm across multiple sequential transfers between "IP LLC" entities is a strong signal.
4. Cascading transfers — present. A rapid succession of transfers occurred in 2022: from SPERO, YECHEZKAL EVAN to SHIELD IP LLC (executed 2022-04-18), then from SHIELD IP LLC to CILIPUS IP LLC (executed 2022-05-18), and from CILIPUS IP LLC to ROLAND IP LLC (executed 2022-05-19). These three transfers between different LLCs happened within a span of just over a month, with the same correspondent, strongly indicating cascading transfers (Reel 061545/0961, 061545/0964, 061751/0816). Another transfer to ELIASON IP LLC occurred less than 8 months later (Reel 063251/0556).
5. Pre-litigation transfer — present. Google Patents indicates that district court litigation (e.g., cases 1:22-cv-00751, 1:22-cv-00752) was filed in Delaware District Court in "2022". The first transfer from the individual inventor to SHIELD IP LLC was executed on 2022-04-18 and recorded on 2022-05-18 (Reel 061545/0961). This assignment occurred within months of the apparent initial litigation filings, suggesting it was part of a strategy to enable patent assertion.
6. Bankruptcy fire-sale — not present. There is no indication from the assignment records or publicly available information that the original assignor, Yechezkal Evan Spero, underwent bankruptcy proceedings.
7. Privateering — unclear. The available data does not provide specific evidence of an operating company transferring the patent to an NPE to assert on its behalf against competitors.
8. Defensive aggregator (anti-NPE) — not present. The current assignee, ELIASON IP LLC, is not a known defensive aggregator.

Verdict

NPE — high confidence

The assignment chain for US10894503 strongly indicates NPE activity. This is supported by multiple shell-entity transfers, as evidenced by the transfers to entities with "IP LLC" in their names (Reel 061545/0961, 061545/0964, 061751/0816, 063251/0556). A clear pattern of cascading transfers between these entities in rapid succession is observed in 2022 (Reel 061545/0961, 061545/0964, 061751/0816), all handled by the same correspondent attorney, Joseph E. Maenner, Esq. (repeat correspondent). Crucially, the initial transfer to SHIELD IP LLC in April/May 2022 (Reel 061545/0961) appears to precede or coincide with the first infringement litigation identified in 2022, marking it as a pre-litigation transfer.

USPTO Assignment Center search for US10894503: https://assignmentcenter.uspto.gov/patent/index.html?cn=10894503

Here is an analysis of the most relevant prior art for US Patent 10,894,503, "Detector controlled headlight system," based on the citations within its text and from the Google Patents references. The priority date for US 10,894,503 is July 12, 2002.

Analysis of Prior Art for US 10,894,503

1. U.S. Pat. No. 5,130,909 to Gross

• Full Citation: US5130909A - Emergency lighting strip.
• Publication/Filing Date: Published: July 14, 1992; Filed: March 15, 1991.
• Brief Description: This patent describes an emergency lighting strip typically comprising a plurality of light sources, such as LEDs, mounted on a substrate and encased in a protective sheathing. Its primary use is as an outline marker for emergency pathways, exit indicators, or ornamental lighting, where the strip itself is the object to be seen.
• Potential Anticipation under 35 U.S.C. § 102:
  • Claim 1 (partially): Potentially anticipates the concept of "a plurality of discrete light sources" mounted on a "headlight fixture" (if interpreted broadly as a lighting assembly). However, it lacks a detector, a controller for individual light source intensity and aiming, and dynamic adjustment based on environmental conditions to prevent glare.
  • Claim 5: Potentially anticipates the use of "light-emitting diode (LED)" as a discrete light source.
  • Claim 7: Could be considered to anticipate "arranged in a matrix" if a linear strip of LEDs is broadly seen as a one-dimensional matrix.
  • This patent does not anticipate the core inventive elements of dynamic control, adjustable aiming, environmental detection, or glare prevention for a vehicle headlight system.

2. U.S. Pat. No. 4,597,033 to Meggs et al.

• Full Citation: US4597033A - Flexible elongated lighting system.
• Publication/Filing Date: Published: June 24, 1986; Filed: March 21, 1984.
• Brief Description: This patent discloses a flexible elongated lighting system that incorporates multiple small light sources, such as miniature incandescent lamps or LEDs, along a flexible conduit. It is intended for decorative or accent lighting where the light sources are visible.
• Potential Anticipation under 35 U.S.C. § 102:
  • Claim 1 (partially): Similar to Gross, it potentially anticipates "a plurality of discrete light sources" within an elongated "headlight fixture." However, it lacks a detector, a controller for individual intensity and aiming, and dynamic environmental adaptation for glare prevention.
  • Claim 5: Potentially anticipates the use of "light-emitting diode (LED)" as a discrete light source.
  • Claim 7: Could be considered to anticipate "arranged in a matrix" if the arrangement of lights is viewed as such.
  • This patent does not anticipate the key features of dynamic control, aiming, environmental detection, or glare prevention for a vehicle headlight system.

3. U.S. Pat. No. 5,577,832 to Lodhie

• Full Citation: US5577832A - Multi-layer light-emitting diode assembly and method of manufacturing same.
• Publication/Filing Date: Published: November 26, 1996; Filed: June 30, 1995.
• Brief Description: This patent describes a multi-layer LED assembly designed as a replacement light, particularly for manufacturing environments. It features multiple LEDs mounted perpendicularly on a base to emit light perpendicularly. US10894503's description notes that this patent makes "no attempt to match the light distribution to the task at hand."
• Potential Anticipation under 35 U.S.C. § 102:
  • Claim 1 (partially): Anticipates "a plurality of discrete light sources, each configured to emit light" and being "mounted on a headlight fixture" (as an assembly). However, it does not disclose individual control over aiming or dynamic adjustments based on environmental conditions for glare prevention.
  • Claim 5: Clearly anticipates the use of "light-emitting diode (LED)".
  • This patent does not anticipate the dynamic control, aiming, environmental condition detection, or glare prevention aspects of Claim 1, nor claims 2-4, 6-16.

4. U.S. Pat. No. 6,379,022 B1 to Amerson et al.

• Full Citation: US6379022B1 - Auxiliary illuminating device having adjustable color temperature.
• Publication/Filing Date: Published: April 30, 2002; Filed: January 24, 2000.
• Brief Description: This patent describes an auxiliary illuminating device with at least two independently adjustable light sources, such as LED arrays of at least two colors, used to achieve adjustable color temperature. Its specific application is for photography. US10894503 notes it "does not integrate the aiming function for correct light distribution" in general illumination.
• Potential Anticipation under 35 U.S.C. § 102:
  • Claim 1 (partially): Anticipates "a plurality of discrete light sources, each configured to emit light" and "a controller configured to individually control an intensity of each of the plurality of discrete light sources." However, it lacks the "aiming" control of each discrete light source, detection of "environmental condition in the vicinity of the vehicle," and the specific dynamic adjustment to "prevent glare to an oncoming vehicle or a preceding vehicle" for a vehicle headlight system.
  • Claim 5: Clearly anticipates the use of "light-emitting diode (LED)".
  • Claim 16: Directly anticipates "the controller is further configured to adjust the color temperature of at least one of the plurality of discrete light sources."
  • This patent primarily anticipates intensity and color control of multiple LEDs, but not the aiming or specific vehicle-related glare prevention features of US10894503.

5. U.S. Pat. No. 6,498,440 B1 to Stam et al.

• Full Citation: US6498440B1 - Illuminator assembly with optical feedback.
• Publication/Filing Date: Published: December 24, 2002; Filed: October 20, 2000.
• Brief Description: This patent describes a lamp assembly incorporating optical feedback to produce a desired resultant hue. It includes a processor, memory, a plurality of light sources (producing different colors), and a detector. The processor independently controls the intensity of each light source based on detector feedback to achieve the desired hue.
• Potential Anticipation under 35 U.S.C. § 102:
  • Claim 1 (partially): Anticipates "a plurality of discrete light sources, each configured to emit light," "a detector configured to detect an environmental condition" (via optical feedback), and "a controller configured to individually control an intensity of each of the plurality of discrete light sources" in response to detected conditions. However, it lacks the "aiming" control of each discrete light source, the application to a "vehicle headlight system," and the specific dynamic adjustment to "prevent glare to an oncoming vehicle or a preceding vehicle."
  • Claim 5: Likely anticipates the use of LEDs given its focus on color/hue control.
  • Claim 16: Strongly anticipates "the controller is further configured to adjust the color temperature of at least one of the plurality of discrete light sources" by producing a desired resultant hue.
  • This patent significantly anticipates intensity and color control with feedback but not the aiming or specific vehicle headlight application with glare prevention.

6. US Patent Application Publication 2002/0130326 A1 to Tamura et al.

• Full Citation: US20020130326A1 - Lighting device.
• Publication/Filing Date: Published: September 19, 2002; Filed: March 15, 2002.
• Brief Description: This publication describes a lighting device with a plurality of LEDs arranged two-dimensionally, covered by a transparent resin layer. It includes a photodetector to detect light intensity from the LEDs and a power supply circuit to control LED driving based on the detection output, aiming for a predetermined balance of light intensities of colors. US10894503 notes it "does not integrally cover the light distribution function within" and lacks correlation of spectrum with intensity or handling color shift over lifetime.
• Potential Anticipation under 35 U.S.C. § 102:
  • Claim 1 (partially): Anticipates "a plurality of discrete light sources, each configured to emit light," being "mounted on a headlight fixture" (as a lighting device), "a detector configured to detect an environmental condition" (photo-detecting unit), and "a controller configured to individually control an intensity of each of the plurality of discrete light sources" in response to detection. It lacks the "aiming" control, the specific "vehicle headlight system" application, and the dynamic adjustment for "preventing glare to an oncoming vehicle or a preceding vehicle."
  • Claim 5: Clearly anticipates the use of "light-emitting diode (LED)".
  • Claim 7: Anticipates "arranged in a matrix" by describing LEDs "arranged in an at least two-dimensionally dispersed manner."
  • Claim 16: Potentially anticipates color temperature adjustment through controlling the "balance of light intensities of the colors."
  • This publication anticipates aspects of light source structure, intensity control, and color adjustment, but not the individual aiming or specific vehicle-related glare prevention.

7. U.S. Pat. No. 6,572,253 B1 to Spero

• Full Citation: US6572253B1 - Digital lighting fixture.
• Publication/Filing Date: Published: June 3, 2003; Filed: December 17, 2001. (Filing date predates US10894503's priority date of July 12, 2002, making it prior art).
• Brief Description: This patent, by the same inventor, discloses a digital lighting fixture comprising a plurality of small discrete light sources (LEDs), at least one detector, and a controller. The light sources are positioned with unique directional vectors or aims and light intensities. The detector gathers signals from the surrounding environment, and the controller adjusts the intensity and aiming of each light source to provide the correct light for the "task at hand." The description in US10894503 notes that the controller can be coupled to a camera to analyze "surfaces and usage within the living space" and adjust lighting.
• Potential Anticipation under 35 U.S.C. § 102: This is the most relevant prior art.
  • Claim 1: Anticipates nearly all elements of Claim 1, including "a plurality of discrete light sources, each configured to emit light, the plurality of discrete light sources mounted on a headlight fixture" (as a "fixture structure capable of receiving a plurality of small discrete light sources"), "at least some of the discrete light sources are mounted to aim in different directions" ("each light source has a unique directional vector, or aim"), "a detector configured to detect an environmental condition in the vicinity of the vehicle" ("at least one detector" inputs "signals from the surrounding environment"), and "a controller configured to individually control an intensity and an aiming of each of the plurality of discrete light sources in response to the detected environmental condition" ("controller controls each of the discrete light sources with respect to the light sources' intensity and aiming in response to the signals from the detector so as to provide the correct light for the task at hand").
    The primary distinguishing features in Claim 1 of US10894503 are the specific application as a "vehicle headlight system for illuminating a road ahead of a vehicle" and the explicit dynamic adjustment to "prevent glare to an oncoming vehicle or a preceding vehicle." While a broad interpretation of "task at hand" and "surrounding environment" might encompass a vehicle application, these specific elements are not explicitly taught.
  • Claim 2 (partially): Anticipates the detection of "environmental condition" in a general sense, but not specifically in the context of "ambient light, adverse weather, or road curvature" for a vehicle.
  • Claim 3 (partially): Anticipates the detection of "environmental condition," but not specifically "presence or movement of an object or living being" for a vehicle.
  • Claim 4: Potentially anticipates if "surrounding environment" is interpreted to include other vehicles, but without explicit mention of "preceding vehicle or an oncoming vehicle."
  • Claim 5: Clearly anticipates the use of "light-emitting diode (LED)".
  • Claim 8: Clearly anticipates "the aiming of at least some of the discrete light sources is physically adjustable" through the concept of each light source having a "unique directional vector, or aim."
  • Claim 14: Potentially anticipates "the detector comprises an image recording device" as US10894503's description references Spero's controller being "coupled to a camera which analyzes surfaces and usage within the living space."
  • Claim 15: Clearly anticipates "the light sources, detector, and controller are integrated into a single sealed-for-life fixture" by describing the combination of "the functions of the lamp and the lighting fixture into one integral unit."
  • It does not directly anticipate claims 6, 9-13, or 16 based on the provided brief description.

The obviousness of US patent 10894503 under 35 U.S.C. § 103 can be analyzed by combining existing prior art references, as detailed within the provided patent text. The "present invention" of US10894503 broadly describes a "Digital Lighting Fixture" that uses multiple, individually controllable LED light sources, integrated with power conditioning electronics, control circuitry, and sensors (including a "smart" camera), to provide real-time adaptable illumination in terms of spatial distribution, intensity, and color, tailored to specific needs and environmental conditions. This system aims to provide light only "when, where and in the proper amount and color."

A person having ordinary skill in the art (POSITA) would have been motivated to combine the following prior art references to arrive at the invention described in US10894503:

Combination: U.S. Pat. No. 6,379,022 (Amerson et al.) + U.S. Pat. No. 6,498,440 (Stam et al.) + United States Patent Application 20020130326 (Tamura et al.) + Prior work by Spero (the inventor).

1. Adjustable Color and Intensity with Feedback (Amerson, Stam, Tamura):

   • Amerson et al. (US 6,379,022) teaches an auxiliary illuminating device with adjustable color temperature, achieved by varying the light output of at least two independently adjustable LED light sources. [cite: U.S. Pat. No. 6,379,022 issued Apr. 30, 2002 to Amerson, et al.] While its application is for photography and lacks correlation between overall illuminance and color temperature, or an integrated aiming function for light distribution, it clearly establishes the concept of dynamic color adjustment in LED lighting. [cite: U.S. Pat. No. 6,379,022 issued Apr. 30, 2002 to Amerson, et al.]
   • Stam et al. (US 6,498,440) describes a lamp assembly that uses optical feedback to produce a desired resultant hue. This assembly includes a processor, memory, multiple light sources (each producing a different color), and a detector, where the processor controls the intensity of each light source based on detector feedback. [cite: U.S. Pat. No. 6,498,440 Stam, et al.] This reference teaches the use of sensors and feedback control for precise color mixing in a multi-LED system.
   • Tamura et al. (US 20020130326) discloses a lighting device with multiple LEDs, a photo-detecting unit to detect light intensity, and a power supply circuit that controls the LEDs based on the detection output to maintain a "predetermined balance of light intensities of the colors." [cite: United States Patent Application 20020130326 issued to Tamura et al.] Similar to Amerson, Tamura's device does not address integral light distribution or correlation between spectrum and intensity, nor does it handle color shift over the device's lifetime. [cite: United States Patent Application 20020130326 issued to Tamura et al.] However, it reinforces the concept of sensor-based control for multi-color LED systems.

2. Adaptive Spatial Light Distribution and Environmental Sensing (Prior work by Spero):

   • The prior work by Spero (the inventor of US10894503), as described in the patent's background, is highly relevant. It details a solution where "an overabundance of LEDs are deployed on the fixture structure giving it the ability to illuminate in all directions at required intensities." [cite: Spero] Crucially, the controller of these LEDs is "coupled to a camera which analyzes surfaces and usage within the living space and adjusts the lighting accordingly." [cite: Spero] This work directly teaches key aspects of US10894503, including a multi-LED fixture, dynamic spatial light distribution, real-time adaptability based on environmental sensing (via a camera), and adjustment according to usage within a living space. The primary drawback mentioned for Spero's prior work was the "over capacity of LEDs and the cost of driver and light sources." [cite: Spero]

Motivation to Combine:

A POSITA, motivated by the desire to create more efficient, intelligent, and user-centric general lighting solutions, would seek to combine the adaptive color and intensity control found in Amerson, Stam, and Tamura with the advanced environmental sensing and spatial light distribution capabilities described in Spero's prior work.

• Addressing Limitations: The explicit limitations identified in Amerson (lack of correlation between illuminance/color temperature and integrated aiming) [cite: U.S. Pat. No. 6,379,022 issued Apr. 30, 2002 to Amerson, et al.] and Tamura (no integral light distribution function or correlation of spectrum with intensity) [cite: United States Patent Application 20020130326 issued to Tamura et al.] would motivate a POSITA to integrate a more comprehensive control system. Spero's prior work directly addresses the "aiming function" and adaptive light distribution based on environmental conditions. [cite: Spero]
• Enhancing Adaptability: Combining the precise color and intensity feedback mechanisms of Stam [cite: U.S. Pat. No. 6,498,440 Stam, et al.] and Tamura [cite: United States Patent Application 20020130326 issued to Tamura et al.] with Spero's camera-based environmental analysis [cite: Spero] would create a system capable of real-time adjustment of both light quality (color/hue) and quantity (intensity and spatial distribution) based on actual conditions, which aligns with the objectives of US10894503 to provide light "only when, where and in the proper amount and color."
• Integration for Practicality: The patent itself notes that "A unique opportunity for integration exists in solid-state luminaire design which has not being taken advantage of." This indicates a known desire in the field to integrate light sources, power conditioning, control circuitry, and sensors into a single, compact, and potentially "sealed-for-life" device, leveraging the long lifespan of LEDs (e.g., 100,000 hours). [cite: LED lamps and ballast systems] This engineering efficiency and reliability motivation would drive a POSITA to combine these functional elements into a single, integral lighting device.
• Improving User Experience and Energy Efficiency: The overall goal of such a combination would be to minimize wasted light and energy while increasing visual performance and comfort, as explicitly stated as the objectives of the present invention. An adaptive system that responds to presence, activity, and external light levels (e.g., daylight contribution, as mentioned in the "inflexible prior-art approach") would be a clear improvement over static lighting systems.

Therefore, a POSITA, motivated by the recognized need for more efficient, adaptable, and integrated LED lighting solutions, would find it obvious to combine the existing technologies for adjustable LED color and intensity control (Amerson, Stam, Tamura) with a camera-based environmental sensing and adaptive spatial light distribution system (Spero's prior work) into a single, integrated "Digital Lighting Fixture."