Katsuyuki Koizumi

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Kanagawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Storage medium initialization method, and recording and reproducing...
- Patent number 7,203,147
- Issue date Apr 10, 2007
- Sony Corporation
- Takashi Kawakami
- G11 - INFORMATION STORAGE
Information Patent Grant
Data recording medium, recording and reproducing system and residua...
- Patent number 6,160,788
- Issue date Dec 12, 2000
- Sony Corporation
- Toshiharu Kobayashi
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Rotary magnetic head and guide drum assembly with reduce mounting h...
- Patent number 4,891,726
- Issue date Jan 2, 1990
- Sony Corporation
- Hisashi Suwa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording and/or reproducing apparatus
- Patent number 4,853,804
- Issue date Aug 1, 1989
- Sony Corporation
- Hisashi Suwa
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
STORAGE MEDIUM INITIALIZATION METHOD, AND RECORDING AND REPRODUCING...
- Publication number 20070086284
- Publication date Apr 19, 2007
- Sony Corporation
- Takashi Kawakami
- G11 - INFORMATION STORAGE
Information Patent Application
Storage medium initialization method, and recording and reproducing...
- Publication number 20030235126
- Publication date Dec 25, 2003
- Sony Corporation
- Takashi Kawakami
- G11 - INFORMATION STORAGE