Susumu Ohtsuka

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Ibaraki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Magnetic recording and reproducing apparatus with recording inhibit...
- Patent number 5,272,576
- Issue date Dec 21, 1993
- Hitachi, Ltd.
- Susumu Ohtsuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording and reproducing apparatus with individual correc...
- Patent number 5,260,843
- Issue date Nov 9, 1993
- Hitachi, Ltd.
- Susumu Ohtsuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Video tape recorder having a special demagnetizing function
- Patent number 5,253,127
- Issue date Oct 12, 1993
- Hitachi, Ltd.
- Yukihiko Ozaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording/reproducing apparatus
- Patent number 5,121,266
- Issue date Jun 9, 1992
- Hitachi, Ltd.
- Yoichi Ito
- H04 - ELECTRIC COMMUNICATION TECHNIQUE