Kouji Tsukamoto

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Hyogo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Sound absorbing mechanism using a porous material
- Patent number 6,109,388
- Issue date Aug 29, 2000
- Mitsubishi Electric Home Appliance Co., Ltd.
- Kouji Tsukamoto
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Sound absorbing mechanism using a porous material
- Patent number 5,905,234
- Issue date May 18, 1999
- Mitsubishi Electric Home Appliance Co., Ltd.
- Kouji Tsukamoto
- G10 - MUSICAL INSTRUMENTS ACOUSTICS