Invalidity dossier
US 8408743
LED module with fixing device
Current assignee: Foxsemicon Integrated Technology Inc
Added 9/23/2026, 2:23:03 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 8408743 B1
Title: LED module with fixing device
Patent number: US 8408743 B1
Application number: US 13/325,003
Inventors: Te-Sheng Chen; Sung-Hsiang Yang
Assignee: Foxsemicon Integrated Technology, Inc. (original and current assignee per the source)
Priority/filing date: 2011-12-13
Grant/publication date: 2013-04-02
Status listed: Expired – Fee Related; adjusted expiration 2031-12-21
Purpose: The disclosure addresses an LED module in which an LED light bar is fixed to a substrate by screwing or pasting, making disassembly for repair or maintenance time-consuming. The stated aim is to facilitate assembly/disassembly of the LED module.
Plain-language scope: The LED module (100) has a light bar (10) and a fixing device (20). The light bar includes a circuit board (15), an electrically insulating and heat conductive board (13), and a metallic supporting plate (11); the board (13) is sandwiched between the circuit board and supporting plate to insulate them while transferring heat to the supporting plate for dissipation. The supporting plate has a main body (110) with a first tongue (112a) and second tongue (112b) at opposite ends, plus two upward flanges (111). The fixing device includes a substrate (21), a tenon (22), and a fastening piece (23) at opposite ends. The tenon has bottom plates, lateral plates, and a top plate forming an inverted U-shape, with longitudinal holes (222a, 224a) receiving the first tongue. The fastening piece has a seat (231), connection wall (232), fixing wall (233), and a pivotable locking arm (234) with a hook portion (234a) and receiving slot (270) engaging a first protrusion (235); curved contact elements (234b) press the second tongue onto the seat. Rotating the locking arm opens/closes the receiving room to clamp or release the light bar.
Source: https://patents.google.com/patent/US8408743/en
What the excerpt does not establish: It does not provide the full claims, complete description, drawing details, or any prosecution history, and does not establish validity, enforceability, ownership transfers, or prior-art effect.
Generated 10/1/2026, 9:52:20 PM
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Litigation summary
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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.