Shotaro Shimizu

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Kunitachi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Electrochromic display device
- Patent number 4,160,241
- Issue date Jul 3, 1979
- Citizen Watch Co., Ltd.
- Shotaro Shimizu
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Electrochromic display device
- Patent number 4,147,416
- Issue date Apr 3, 1979
- Citizen Watch Co., Ltd.
- Shotaro Shimizu
- G02 - OPTICS