Hiroaki Itoh

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Hamamatsu, JP

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Patents Grantslast 30 patents

Information Patent Grant
Speaker diaphragm
- Patent number 5,241,140
- Issue date Aug 31, 1993
- Yamaha Corporation
- Hiroaki Itoh
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Microwave plasma chemical vapor deposition apparatus comprising an...
- Patent number 5,234,502
- Issue date Aug 10, 1993
- Yamaha Corporation
- Osamu Mochizuki
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...