Invalidity dossier
US 12191912
Linearized optical digital-to-analog modulator
Current assignee: Ramot at Tel Aviv University Ltd
Added 9/24/2026, 12:06:28 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 12191912 B2
Title: Linearized optical digital-to-analog modulator
Patent number / application: US 12191912 B2; application US 18/334,269; pre-grant publication US 2023/0403079 A1 (published 2023-12-14).
Assignee: Ramot at Tel Aviv University Ltd. (original and current assignee). Inventors: Yossef Ehrlichman, Ofer Amrani, and Shlomo Ruschin.
Key dates: Priority date 2007-06-13 (stated as an assumption by the source); filing date 2023-06-13; granted/publication date 2025-01-07; anticipated expiration 2028-06-12. The record also lists later priority filings to US 18/822,532 (US 12388533 B2, 2024-09-03) and US 19/274,676 (US 2025/0350366 A1, 2025-07-21).
Purpose and plain-language scope (from the supplied text): The patent concerns converting a digital input into an analog optical output using a linearized optical modulator. The classifications place it in optical digital-to-analog conversion (G02F 7/00; H03M 1/66), Mach-Zehnder-type interferometric waveguide modulators (G02F 1/225, G02F 1/212), and optical transmission/transmitter modulation (H04B 10/50, 10/54, 10/541). A stated function characteristic is "linearised modulation; reduction of harmonic distortions" (G02F 2203/19). Prior-art keywords listed include "words, digital, input, output, digital input," indicating operation on multi-bit digital words to produce an output. In short: a device and method in which bits of a digital word drive an interferometric optical modulator whose response is linearized to reduce distortion, yielding an analog optical signal.
Source: https://patents.google.com/patent/US12191912/en (fetched 2026-09-24).
What the excerpt does not establish: the claims' actual wording, dependent-claim limitations, specification embodiments, or drawings; the specific linearization technique; inventor/assignee accuracy beyond the listed data; the source expressly notes legal status, assignee listing, and priority date are assumptions, not legal conclusions. The excerpt also contains no substantive prior-art discussion or litigation detail, and the classification list is truncated.
Generated 10/1/2026, 9:32:02 PM
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Litigation summary
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Proceedings on file (0)
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PTAB challenges
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Assignment history
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Prior art
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Obviousness
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Extensions
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Derivative works
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