Takehiro Ishikawa

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Tokyo, JA

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Patents Grantslast 30 patents

Information Patent Grant
Digital electronic timepiece
- Patent number 4,091,609
- Issue date May 30, 1978
- Kabushiki Kaisha Daini Seikosha
- Takehiro Ishikawa
- G04 - HOROLOGY
Information Patent Grant
Drive circuit of light emitting means for liquid crystal electronic...
- Patent number 4,051,664
- Issue date Oct 4, 1977
- Kabushiki Kaisha Daini Seikosha
- Takehiro Ishikawa
- G04 - HOROLOGY