Invalidity dossier
US 8837454
Simultaneous multiband operation of a MIMO communication device
Current assignee: Avago Technologies International Sales Pte Ltd
Added 9/23/2026, 5:55:04 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 — US8837454B2
Title: Simultaneous multiband operation of a MIMO communication device
Patent number / application: US8837454B2; application US13/466,516; publication US20130301631A1
Inventor: Gireesh Hegde
Assignee: Original assignee Broadcom Corp.; current assignee listed as Avago Technologies International Sales Pte Ltd (Google Patents notes assignee listings may be inaccurate and are not a legal analysis)
Key dates: Priority/filing date 2012-05-08; publication of application 2013-11-14; granted 2014-09-16; status Active with adjusted expiration 2032-07-10
Purpose: The disclosure relates to wireless communication, specifically simultaneous multiband operation of a Multiple-Input-Multiple-Output (MIMO) communication device. It addresses how a communication device can simultaneously communicate across multiple network channels using a communication resource such as a wireless communication radio.
Plain-language scope (from the excerpt): A communication device has a wireless radio with multiple transceivers (e.g., transceiver A and transceiver B, each with an antenna). In a time-multiplexing method, all communication resources are used on a single network channel at any point in time ("single band communication"), alternating between channels. In contrast, the described approach supports simultaneous multiband communication using a MIMO technique. The radio may be an M×N MIMO radio with M transmitters and N receivers, and transmitters, receivers, or transceivers may be implemented in a PHY portion (PHY core). Network channels may follow standards such as 802.11a/b/g/n/ac, WiMAX, Bluetooth, HSPA+, 4G, and 3GPP LTE. Figures show time-multiplexing, timing examples of simultaneous multiband communication, a mobile communication device, simultaneous multiband logic, and MAC-related architecture.
Source: https://patents.google.com/patent/[US8837454](/patent/US8837454)/en
What the excerpt does not establish: It does not provide the claims, detailed description, or prior-art references; it does not establish the specific mechanisms by which simultaneous multiband operation is achieved, nor any legal conclusions on validity or claim scope.
Generated 10/1/2026, 9:43:11 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 8837454. The free-form analysis below may also discuss cases beyond this list.
No cases on file mention this patent. Upload a CSV or add a case manually in Admin → Manage litigation cases.
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.