Osamu Kamisawa

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electronic watch equipped with solar cell
- Patent number 6,181,648
- Issue date Jan 30, 2001
- Citizen Watch Co., Ltd.
- Masao Mafune
- G04 - HOROLOGY
Information Patent Grant
Electronic digital timepiece having a stopwatch function and a time...
- Patent number 4,236,238
- Issue date Nov 25, 1980
- Citizen Watch Company Limited
- Katsuhiko Komiyama
- G04 - HOROLOGY