Mamaru Watanabe

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Chiba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Timepiece with calendar mechanism containing 2 date indicators
- Patent number 7,254,094
- Issue date Aug 7, 2007
- Seiko Instruments Inc.
- Mamaru Watanabe
- G04 - HOROLOGY
Information Patent Grant
Timepiece equipped with calendar mechanism including first and seco...
- Patent number 7,180,829
- Issue date Feb 20, 2007
- Seiko Instruments Inc.
- Mamaru Watanabe
- G04 - HOROLOGY