Invalidity dossier
US 10033465
Linearized optical digital-to-analog modulator
Current assignee: Cisco Systems, Inc.
Added 9/24/2026, 12:47:30 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 — US10033465B2
Title: Linearized optical digital-to-analog modulator
Patent number / application: US10033465B2; application US15/298,327; publication US20170294968A1.
Assignee / inventors: Current assignee listed as Ramot at Tel Aviv University Ltd. Inventors: Yossef Ehrlichman, Ofer Amrani, and Shlomo Ruschin. Assignment to Ramot at Tel-Aviv University Ltd. recorded 2017-10-23.
Key dates (as listed): Priority date 2007-06-13; filing date 2016-10-20; publication of US20170294968A1 on 2017-10-12; granted 2018-07-24; anticipated expiration 2028-06-12. Legal status shown as Active.
Purpose and plain-language scope: The supplied excerpt identifies the invention as a linearized optical digital-to-analog modulator. Its classifications place it in optical transmission and modulation (H04B10/00, H04B10/50, H04B10/516, H04B10/54, H04B10/541), optical devices controlled by interference in waveguide structures including Mach-Zehnder types (G02F1/21, G02F1/212, G02F1/225), optical analogue/digital converters (G02F7/00), and digital-to-analogue conversion (H03M1/00, H03M1/66). The listed "prior art keywords" are: optical, bits, input, electrodes, modulator. Taken together, this indicates an optical modulator that converts a digital input into an analog optical output, with linearization as the stated aim. The excerpt does not describe the internal structure, electrode arrangement, bit-weighting scheme, or linearization method; it provides only the title, classification tags, and keyword list.
Source URL: https://patents.google.com/patent/[US10033465](/patent/US10033465)/en
What this excerpt does not establish: No claims, specification text, drawings, or embodiments are included, so the actual claimed scope, independent/dependent claim structure, and technical operation are not evidenced here. The excerpt also carries disclaimers that the legal-status, assignee, and priority-date listings are assumptions, not legal conclusions; and it references litigation and PTAB entries, which are outside the scope of this overview and were not investigated.
Generated 10/1/2026, 9:31:54 PM
Cases on file (1)
Group view →Specific litigation cases in our database that name US patent 10033465. 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: Cisco Systems, 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.
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This patent in court (1)
1 tracked lawsuit name US 10033465.