Keizo Kato

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Hachioji, JP

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Patents Grantslast 30 patents

Information Patent Grant
Embossing metal hold
- Patent number 5,338,178
- Issue date Aug 16, 1994
- Hitachi, Ltd.
- Keizo Kato
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Process for producing optical disks
- Patent number 5,330,880
- Issue date Jul 19, 1994
- Hitachi, Ltd.
- Shinkichi Horigome
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of magnetically recording and reading data, magnetic recordi...
- Patent number 5,296,995
- Issue date Mar 22, 1994
- Hitachi, Ltd.
- Seiji Yonezawa
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Magneto-optic recording/reproducing method and device and magneto-o...
- Patent number 5,295,121
- Issue date Mar 15, 1994
- Hitachi, Ltd.
- Hirofumi Sukeda
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording member
- Patent number 4,348,461
- Issue date Sep 7, 1982
- Hitachi, Ltd.
- Motoyasu Terao
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Optical information recording apparatus
- Patent number 4,241,240
- Issue date Dec 23, 1980
- Hitachi, Ltd.
- Kazuo Shigematsu
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for recording and reproducing a video-disc wit...
- Patent number 4,223,187
- Issue date Sep 16, 1980
- Hitachi, Ltd.
- Seiji Yonezawa
- G11 - INFORMATION STORAGE