Kiyoshi Umezawa

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Owara-asahi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Filled shaped generating apparatus
- Patent number 4,626,838
- Issue date Dec 2, 1986
- Hitachi, Ltd.
- Shigeo Tsujioka
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Graphic display apparatus with a vector generating circuit
- Patent number 4,580,236
- Issue date Apr 1, 1986
- Hitachi, Ltd.
- Shigeo Tsujioka
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Refresh control system
- Patent number 4,158,883
- Issue date Jun 19, 1979
- Hitachi, Ltd.
- Shinji Kadono
- G06 - COMPUTING CALCULATING COUNTING