Inventor · disambiguated record
Sizuo Yamaguchi
Also filed as: YAMAGUCHI SIZUO
5 granted patents·39 citations·filing 1976–1981
79Inventor score
Technology areasG04G
Files withCITIZEN WATCH CO LTD5
Top patents by PatentIndex Score
5 records- 0166US4272836AAlarm timepieceCITIZEN WATCH CO LTD·Filed 1979·Granted Jun 9, 1981·11 cites·10 claims
- 0263US4060975AMethod and apparatus for driving electrochromic display deviceCITIZEN WATCH CO LTD·Filed 1976·Granted Dec 6, 1977·11 cites·10 claims
- 0352US4225824AFrequency adjusting circuitCITIZEN WATCH CO LTD·Filed 1978·Granted Sep 30, 1980·6 cites·10 claims
- 0440US4336609ADigital input means for miniature type electronic devicesCITIZEN WATCH CO LTD·Filed 1981·Granted Jun 22, 1982·6 cites·2 claims
- 0535US4370066ACorrection signal input system for electronic timepieceCITIZEN WATCH CO LTD·Filed 1980·Granted Jan 25, 1983·5 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →