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Shoichiro Kumazawa
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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Timepiece with mobile decorations
Patent number
5,047,998
Issue date
Sep 10, 1991
Seikosha Co., Ltd.
Junichi Aizawa
G04 - HOROLOGY
Information
Patent Grant
Power supply device for hand with luminescence element
Patent number
4,995,022
Issue date
Feb 19, 1991
Seikosha Co., Ltd.
Hidetsugu Ikeda
G01 - MEASURING TESTING
Information
Patent Grant
Method of spot welding parts of an electromagnetic bell unit
Patent number
4,968,971
Issue date
Nov 6, 1990
Seikosha Co., Ltd.
Junichi Aizawa
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Electromagnetic bell unit, its fitting structure and a method of we...
Patent number
4,912,453
Issue date
Mar 27, 1990
Seikosha Co., Ltd.
Junichi Aizawa
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Electromagnetic bell
Patent number
D304163
Issue date
Oct 24, 1989
Seikosha Co., Ltd.
Junichi Aizawa
D10 - Measuring, testing, or signalling instruments