Shiyouichi Yamaka

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Kamifukuoka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Focusing screen holding device
- Patent number 4,365,883
- Issue date Dec 28, 1982
- Asahi Kogaku Kogyo Kabushiki Kaisha
- Yukio Takaoka
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY