Yoshihisa Kawamura

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Sendai, JP

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Patents Grantslast 30 patents

Information Patent Grant
Geomagnetic direction sensor
- Patent number 5,982,176
- Issue date Nov 9, 1999
- Sony Corporation
- Yoshihisa Kawamura
- G01 - MEASURING TESTING
Information Patent Grant
Disc-shaped magnetic recording medium
- Patent number 4,788,092
- Issue date Nov 29, 1988
- Sony Corporation
- Ryoji Chubachi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium
- Patent number 4,654,260
- Issue date Mar 31, 1987
- Sony Corporation
- Ryoji Chubachi
- G11 - INFORMATION STORAGE