Yoshihisa Okuma

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Tokyo, JA

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Patents Grantslast 30 patents

Information Patent Grant
Electronic engraving system
- Patent number 4,052,739
- Issue date Oct 4, 1977
- Matsushita Electric Industrial Co., Ltd.
- Masanobu Wada
- B42 - BOOKBINDING ALBUMS FILES SPECIAL PRINTED MATTER
Information Patent Grant
Electro-optical cell
- Patent number 3,977,767
- Issue date Aug 31, 1976
- Dai Nippon Insatsu Kabushiki Kaisha
- Yoshihisa Okuma
- G02 - OPTICS