Ryouhei Koyama

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Hyuga, JP

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Patents Grantslast 30 patents

Information Patent Grant
Disc for rotary encoder and method for producing same
- Patent number 4,673,808
- Issue date Jun 16, 1987
- Asahi Kasei Kogyo Kabushiki Kaisha
- Takashi Katohno
- G01 - MEASURING TESTING
Information Patent Grant
Printed coil unit for small size actuator
- Patent number 4,658,162
- Issue date Apr 14, 1987
- Asahi Kasei Kogyo Kabushiki Kaisha
- Ryouhei Koyama
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER