Masao Mafune

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Kawagoe, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electronic device with display section
- Patent number 6,661,743
- Issue date Dec 9, 2003
- Citizen Watch Co., Ltd.
- Masao Mafune
- G04 - HOROLOGY
Information Patent Grant
Electronic timepiece having power generating function
- Patent number 6,580,665
- Issue date Jun 17, 2003
- Citizen Watch Co., Ltd.
- Yasuo Kamiyama
- G04 - HOROLOGY
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
Display unit structure for electronic device
- Patent number 5,841,738
- Issue date Nov 24, 1998
- Citizen Watch Co., Ltd.
- Yuichi Kamei
- G04 - HOROLOGY
Information Patent Grant
Watch with dumb alarm
- Patent number 5,367,505
- Issue date Nov 22, 1994
- Citizen Watch Co., Ltd.
- Hidetaka Tsuchiya
- G04 - HOROLOGY
Information Patent Grant
Watch with hand in form of circular film and provided with electros...
- Patent number 4,737,941
- Issue date Apr 12, 1988
- Citizen Watch Co., Ltd.
- Yasuo Kamiyama
- G04 - HOROLOGY