Invalidity dossier
US 7354184
Light emitting panel assemblies
Current assignee: Rambus Delaware LLC
Added 9/23/2026, 4:11:55 PM
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Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US 7,354,184 B2
Title: Light emitting panel assemblies
Patent number / application: US 7,354,184 B2; application US 11/133,487, filed 2005-05-20; published as US 2005/0207154 A1 on 2005-09-22; granted 2008-04-08.
Inventor: Jeffrey R. Parker. Original assignee: Solid State Opto Ltd (assignment recorded 2005-06-06). The source lists Rambus Delaware LLC as current assignee. Priority date: 1995-06-27 (claimed from US 08/495,176, which issued as US 5,613,751). Status: Expired – Fee Related; anticipated expiration 2015-06-27. The source notes the family has litigation.
Purpose / plain-language scope: The patent concerns light emitting panel assemblies — planar light guides used to distribute light. As reflected in the excerpt, the disclosure addresses coupling light from a light source into a light guide, including shaping portions of the guide (e.g., collimating, focusing or diverging surfaces, or holes/recesses housing part of the light source), and coupling light out via surface features such as 2-D arrangements of prisms, protrusions, indentations or roughened surfaces, and linear grooves extending across the guide. Classifications include G02B6/00-series light-guide art, G09F13/00 (illuminated signs), F21V5/00 and F21V5/10 (refractors, including photoluminescent material), and A61M21/02.
The source excerpt is dominated by bibliographic, classification and status data. It includes no claims, no abstract, no detailed description and no drawings text, and the claim language is not reproduced. It also does not establish the specific limitations of any claim, the number of claims, the exact priority chain beyond the noted 1995-06-27 claim, or the content of the litigation. No legal conclusion about validity, enforceability, infringement or the accuracy of the listed assignees is supported by the excerpt.
Generated 10/1/2026, 9:51:04 PM
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Litigation summary
Past and pending lawsuits — plaintiffs, defendants, jurisdictions, outcomes, and notable rulings.
Proceedings on file (0)
All PTAB activity →AIA trial proceedings (IPR / PGR / CBM) filed at the USPTO Patent Trial and Appeal Board against this patent. Sourced from the USPTO Open Data Portal and refreshed every six hours; each proceeding number deep-links to the PTAB E2E docket.
No PTAB proceedings on file. This patent has not been challenged via IPR, PGR, or CBM. The absence is itself a signal — well-asserted patents eventually attract IPRs. The LLM analysis below may surface filings the ODP feed hasn’t indexed yet.
PTAB challenges
AIA trial proceedings at the USPTO Patent Trial and Appeal Board — IPR, PGR, and CBM. Petitioners, judge panels, claim-level invalidation outcomes from Final Written Decisions, and Federal Circuit appeals. The single most important defensive datapoint after litigation history.
Assignment history
Inventors, original assignee, and the chain of ownership recorded with the USPTO — including the correspondent attorney who recorded each assignment, since shell-LLC chains often share one repeat-player attorney even when the entity names look unrelated. Surfaces NPE / patent-troll patterns: shell-entity transfers, known asserters in the chain, repeat correspondent fingerprints, pre-litigation assignments, and bankruptcy fire-sales.
Prior art
Earlier patents, publications, and products that may anticipate or render the claims unpatentable.
Obviousness
Combinations of prior art that suggest the claimed invention would have been obvious under 35 U.S.C. § 103.
Extensions
Patent term adjustments, term extensions, continuations, divisionals, family members, and expiration dates.
Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.