Invalidity dossier
US 9548775
Mitigation of transmitter passive and active intermodulation products in real and continuous time in the transmitter and co-located receiver
Current assignee: Finesse Wireless LLC
Added 9/21/2026, 4:02:01 AM
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 9,548,775 B2
Title: Mitigation of transmitter passive and active intermodulation products in real and continuous time in the transmitter and co-located receiver
Patent number: US 9,548,775 B2
Application number: US 12/851,510
Inventor: Francis J. Smith
Current assignee (as listed): Finesse Wireless LLC; original assignee Individual
Priority date: 2007-09-06 (claimed from US 11/851,185)
Filing date: 2010-08-05
Publication date (grant): 2017-01-17
Adjusted expiration (as listed): 2029-09-05
Other version: US 20110075754 A1
Purpose and plain-language scope
The patent addresses non-linear intermodulation products (IMPs) generated by high-power transmitters and by co-located receivers. The field is stated as radio receivers and nonlinear transmitters, specifically mitigating non-linear intermodulation product distortions and interference in continuous and real time via processes in the transmitter and co-located receiver(s).
Transmitters such as HPAs, TWTAs, and multi-module SSPAs/LNAs are described as non-linear devices that generate active IMPs; linearizing them often costs 3–4 dB of output power. The described approach lets the transmitter run at or near saturation with multiple carriers and multiple amplitude signals while still meeting out-of-band emission (OOBE) requirements, and addresses passive IMPs and amplifier/feed-thru effects. The summary states the invention can suppress passive/active IMPs by 20+ dB, and, when implemented with an earlier application (Ser. No. 10/603,798, filed Jun. 24, 2003), prevents side lobe re-growth (SLRG) and non-linear AM/AM and AM/PM distortion; in the receiver it suppresses receiver-generated IMPs plus active and passive IMPs from transmitters.
Although described in conjunction with satellite communications, the text states the invention is applicable to terrestrial, wired/cable, wireless mobile and base station, commercial/military, wireless LAN, air-to-air, air-to-ground, ground-to-air, and satellite-to-satellite links.
Source: https://patents.google.com/patent/US9548775/en
What the excerpt does not establish
The supplied excerpt lists classifications (H04B1/00, H04B1/06, H04B1/10, H04B1/109) but contains no claim text. It therefore does not establish the specific claimed elements, claim scope, or claim count. It also does not establish figures' details beyond their captions, nor any litigation, ownership, validity, or prior-art conclusions.
Generated 10/1/2026, 10:02:37 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 9548775. 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.