Seiji Ohata

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Kawasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Sound record playing apparatus having shock responsive weight membe...
- Patent number 5,138,602
- Issue date Aug 11, 1992
- Ozen Corporation
- Eishi Koike
- G11 - INFORMATION STORAGE
Information Patent Grant
Simplified acoustic playback apparatus
- Patent number 5,103,442
- Issue date Apr 7, 1992
- Ozen Corporation
- Eishi Koike
- G11 - INFORMATION STORAGE