Yoji Ishikawa

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Tokyo, JA

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Patents Grantslast 30 patents

Information Patent Grant
Deflection yoke
- Patent number 4,096,531
- Issue date Jun 20, 1978
- Sony Corporation
- Yukio Yamada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Image-projection system
- Patent number 3,949,167
- Issue date Apr 6, 1976
- Sony Corporation
- Kuniyoshi Koyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE