Inventor · disambiguated record
Hisahide Nakagawa
Also filed as: NAKAGAWA HISAHIDE
3 granted patents·77 citations·filing 1979–1985
72Inventor score
Files withCITIZEN WATCH CO LTD3
Top patents by PatentIndex Score
3 records- 0174US4627739ABracelet type wrist watchCITIZEN WATCH CO LTD·Filed 1985·Granted Dec 9, 1986·54 cites·9 claims
- 0268US4223524AQuartz oscillation circuit for electronic timepiecesCITIZEN WATCH CO LTD·Filed 1979·Granted Sep 23, 1980·19 cites·6 claims
- 0331US4328570AElectronic timepiece with illumination lamp battery voltage drop compensation circuitCITIZEN WATCH CO LTD·Filed 1980·Granted May 4, 1982·4 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →