Invalidity dossier
US 8154581
Audio-video communication system for receiving person at entrance
Current assignee: SB IP Holdings, LLC
Added 9/23/2026, 8:56:38 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 — US 8,154,581 B2
Title: Audio-video communication system for receiving person at entrance
Patent number: US8154581B2 | Application: US11/618,615 | Publication: US20070103548A1 (2007-05-10); granted 2012-04-10
Inventor: Ronald Carter | Original assignee: Revolutionary Concepts, Inc. | Current assignee (as listed): SB IP Holdings LLC
Dates: Priority date 2002-10-15; filing date 2006-12-29; adjusted expiration 2027-05-31. Legal status: Active – Reinstated.
Classification: H04N7/18 and H04N7/186 (CCTV; video door telephones); G07C9/00 and G07C9/00309 (electronically operated locks with bidirectional data transmission).
Purpose and plain-language scope: The patent is directed to an audio-video communication system that lets an occupant receive, see, and speak with a person at an entrance. The supplied excerpt identifies the prior-art keywords as "audio," "entrance," "wireless," "communication system," and "person," and classifies the subject matter under closed-circuit television for receiving images from a single remote source and video door telephones. The classifications indicate the system combines video capture at the entry point with two-way audio and some form of wireless communication between the entrance unit and a device used by the occupant. The G07C classification further associates the arrangement with electronically operated locks using bidirectional data transmission between a data carrier and a lock, i.e., remote unlocking or entry control. The excerpt states the abstract and claims are not reproduced here, so the precise claimed scope is not established by this text. Priority is claimed from US10/682,185 (US7193644B2), and the patent has later family members and continuations, including US8164614B2 and US8144184B2.
Not established by the excerpt: specific claim language or claim count; how the system detects a visitor, what devices or networks are used, or any encryption, hardware, or power details; abstract; drawing content; figure descriptions; the patent's stated field, background, or detailed description. The excerpt also does not establish the accuracy of the assignee listing or legal-status/expiration statements, which are expressly labeled assumptions.
Generated 10/1/2026, 9:41:04 PM
Cases on file (1)
Group view →Specific litigation cases in our database that name US patent 8154581. 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: SB IP Holdings, LLC
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.
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This patent in court (1)
1 tracked lawsuit name US 8154581.