Invalidity dossier
US 6631845
Two window optical scanner
Current assignee: Symbol Technologies, Inc.
Added 9/24/2026, 1:09:59 AM
Active provider: DeepSeek · deepseek-v4-flash
Patent summary
Title, assignee, inventors, filing/issue dates, abstract, and a plain-language overview of the claims.
Cases on file (1)
Group view →Specific litigation cases in our database that name US patent 6631845. The free-form analysis below may also discuss cases beyond this list.
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.
Current assignee: Symbol Technologies, Inc.
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.
Keep exploring
More patents asserted by Symbol Technologies, Inc.
- US 5243655Analysis of U.S. Patent 5,243,655 Date of Analysis: April 26, 2026 Overview This report provides a summary of United States Patent 5,243,655, titled "System for encoding and decoding data in machine readable graphic form." The analysis is…
- US 4409470I'll search for authoritative records on this patent, including any litigation/docket activity. Let me check specifically for litigation and any appellate docket activity. US Patent 4,409,470 — Verification Summary I searched for the exact…
- US 4387297I'll search for authoritative information on US 4387297, including USPTO records and any 2026 CAFC activity. Let me try to retrieve the actual claim text (independent claims) to avoid fabricating. US 4,387,297 — Identification | Field |…
- US 4593186I'll run searches for litigation/docket information on this specific patent number before summarizing. Let me check for any recent (2026) litigation activity and the full claim set. Summary: US Patent 4,593,186 Verification note on the…
- US 4387186I'll search for the specific patent number and check for any litigation activity. Let me run more targeted searches for the exact patent number. Let me run a couple more checks for litigation/CAFC activity and the family members. US Patent…
- US 6854655I'll search for this specific patent number and check for any litigation/docket activity. US 6,854,655 B2 — Verified Data Sheet Search performed: USPTO/Google Patents record for US 6,854,655, plus a targeted check of Federal Circuit /…
- US 5479002
- US 5646390I'll search for authoritative information on this specific patent number. Let me run a couple more targeted searches on litigation and any 2026 appellate activity. Patent Analysis Report — US 5,646,390 Scope note: I searched for the exact…
This patent in court (1)
1 tracked lawsuit name US 6631845.