Keiko Kanetsuka

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic recording and reproducing apparatus having a drum preampli...
- Patent number 5,901,005
- Issue date May 4, 1999
- Sony Corporation
- Teruyuki Yoshida
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording signal amplifier apparatus
- Patent number 5,636,074
- Issue date Jun 3, 1997
- Sony Corporation
- Teruyuki Yoshida
- G11 - INFORMATION STORAGE
Information Patent Grant
Data recording apparatus
- Patent number 5,223,990
- Issue date Jun 29, 1993
- Sony Corporation
- Teruyuki Yoshida
- G11 - INFORMATION STORAGE