Invalidity dossier
US 10205527
Linearized optical digital-to-analog modulator
Current assignee: Ramot at Tel Aviv University Ltd
Added 9/23/2026, 11:35:22 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 — US10205527B2
Title: Linearized optical digital-to-analog modulator
Patent number: US10205527B2 (application US15/298,373; pre-grant publication US20170302291A1)
Inventors: Yossef Ehrlichman, Ofer Amrani, Shlomo Ruschin
Assignee: Ramot at Tel Aviv University Ltd. (original assignee, per the listing; an assignment recorded 2017-02-05)
Key dates: Priority date 2007-06-13; filing date 2016-10-20; publication date 2019-02-12; anticipated expiration 2028-06-12. Status listed as Active.
Purpose and scope (plain language, drawn only from the supplied text): The patent concerns an optical digital-to-analog modulator that is "linearized." The classification data indicate the subject matter involves controlling intensity, phase, or color of light by interference in an optical waveguide structure — specifically Mach-Zehnder type configurations — and optical analogue/digital converters, with an expressed function characteristic of "linearised modulation; reduction of harmonic distortions." The prior-art keywords listed are electrode, binary, actuating, optical, and actuation. The text does not supply the claims, abstract, or description, so the specific structure, electrode arrangement, binary actuation scheme, and the linearization method cannot be stated from this source.
Source URL: https://patents.google.com/patent/[US10205527](/patent/US10205527)/en
What this excerpt does not establish:
- The actual claims, abstract, or written description (only bibliographic, classification, and prosecution-event data are present).
- The technical details of how linearization or harmonic-distortion reduction is achieved.
- The scope of any specific claim limitation or its breadth.
- The identity, content, or relevance of any prior art.
- Litigation, ownership, or validity matters (the source does include litigation and reassignment metadata; these are deliberately not addressed here per instructions).
- Any legal conclusion about patent status, as the source itself states the legal status is an assumption and not a legal conclusion.
Generated 10/1/2026, 9:32:36 PM
Cases on file (0)
Specific litigation cases in our database that name US patent 10205527. 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.