Hideyuki Yamakawa

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Fujisawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus for information recording and reproducing
- Patent number 6,980,385
- Issue date Dec 27, 2005
- Hitachi Video and Information System, Inc.
- Takatoshi Kato
- G11 - INFORMATION STORAGE
Information Patent Grant
Apparatus for information recording and reproducing
- Patent number 6,791,776
- Issue date Sep 14, 2004
- Hitachi, Ltd.
- Takatoshi Kato
- G11 - INFORMATION STORAGE
Information Patent Grant
System for reproducing high-density magnetic record data with viter...
- Patent number 5,844,741
- Issue date Dec 1, 1998
- Hitachi, Ltd.
- Hideyuki Yamakawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic disk drive including a data discrimination apparatus capab...
- Patent number 5,625,632
- Issue date Apr 29, 1997
- Hitachi, Ltd.
- Yoshiteru Ishida
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording/reproducing apparatus having a clock timing e...
- Patent number 5,553,104
- Issue date Sep 3, 1996
- Hitachi, Ltd.
- Terumi Takashi
- G11 - INFORMATION STORAGE
Information Patent Grant
AGC circuit and recording and reproducing apparatus using AGC circuit
- Patent number 5,448,424
- Issue date Sep 5, 1995
- Hitachi, Ltd.
- Akihiko Hirano
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Apparatus for information recording and reproducing
- Publication number 20050041316
- Publication date Feb 24, 2005
- Takatoshi Kato
- G11 - INFORMATION STORAGE
Information Patent Application
Apparatus for information recording and reproducing
- Publication number 20010043416
- Publication date Nov 22, 2001
- Takatoshi Kato
- G11 - INFORMATION STORAGE