Invalidity dossier
US 8308334
Light emitting panel assemblies
Current assignee: Rambus Delaware LLC
Added 9/23/2026, 2:51:48 PM
Active provider: DeepSeek · deepseek-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Patent Overview — US8308334B2
Title: Light emitting panel assemblies
Patent number: US8308334B2 (application US13/314,751; publication US20120081919A1)
Inventor: Jeffery R. Parker
Assignee: Original assignee Rambus International Ltd; current assignee listed as Rambus Delaware LLC (an assignment recorded 2013-03-04 from Rambus Inc.)
Key dates: Priority date 1995-06-27 (with an earlier priority claim noted from US09/256,275, dated 1999-02-23); filing date 2011-12-08; publication date 2012-11-13; anticipated expiration 2015-06-27. Legal status listed as "Expired - Fee Related."
Classification: G02B6/00 and subclasses, covering light guides adapted for lighting devices or systems, including planar/plate-like light guides, coupling-in and coupling-out improvements, arrangements of plural sources (e.g. multi-colour), 2-D arrangements of prisms/protrusions/indentations or roughened surfaces, linear grooves, and light-guide tapers. A61B90/30 and A61B2090/309 appear, relating to illuminating a surgical field, including white LEDs.
Purpose and plain-language scope: The patent concerns light emitting panel assemblies. Per the supplied text, the disclosed subject matter involves light guides—particularly planar or plate-like forms—with features for improving coupling of light from a source into the guide (including by shaping the guide, e.g. collimating, focussing or diverging surfaces, and housing at least part of the light source via holes or recesses), and features for improving coupling-out of light (including 2-D arrangements of prisms, protrusions, indentations or roughened surfaces, and linear grooves). It also covers plural light sources, such as multi-colour sources, and light-guide tapers. The prior-art keywords listed are "light," "panel member," "assembly," "panel," and "transition area."
Source: https://patents.google.com/patent/[US8308334](/patent/US8308334)/en
What the excerpt does not establish: It does not provide the claims, written description, drawings, or any limitations of claim scope. It also does not establish the accuracy of the priority date (expressly an assumption), the legal status, or the current assignee; and no litigation, ownership-transfer, validity, or prior-art analysis has been performed here.
Generated 10/1/2026, 9:51:54 PM
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Litigation summary
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Proceedings on file (0)
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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
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Obviousness
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Extensions
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Derivative works
Defensive disclosure: derivative variations of each claim designed to render future incremental improvements obvious or non-novel.