Tadao Okabe

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Hachioji, JP

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Patents Grantslast 30 patents

Information Patent Grant
Gas discharge display apparatus
- Patent number 4,566,006
- Issue date Jan 21, 1986
- Hitachi, Ltd.
- Yukio Okamoto
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Gas discharge display apparatus capable of emphasis display
- Patent number 4,486,747
- Issue date Dec 4, 1984
- Hitachi, Ltd.
- Yukio Okamoto
- G09 - EDUCATION CRYPTOGRAPHY DISPLAY ADVERTISING SEALS
Information Patent Grant
Gas discharge display device
- Patent number 4,333,040
- Issue date Jun 1, 1982
- Hitachi, Ltd.
- Yukio Okamoto
- H01 - BASIC ELECTRIC ELEMENTS