Satoshi Hasegawa

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Yamato, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for reducing noise in a closed space having divergence de...
- Patent number 5,809,152
- Issue date Sep 15, 1998
- Hitachi, Ltd.
- Mitsuru Nakamura
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Noise reduction apparatus
- Patent number 5,455,779
- Issue date Oct 3, 1995
- Hitachi, Ltd.
- Noriharu Sato
- G10 - MUSICAL INSTRUMENTS ACOUSTICS