Koichi Mayama

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Mobara, JP

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Patents Grantslast 30 patents

Information Patent Grant
Timing signal generating circuit
- Patent number 4,291,241
- Issue date Sep 22, 1981
- Hitachi, Ltd.
- Koichi Mayama
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Memory device with circulating storage loops
- Patent number 4,290,117
- Issue date Sep 15, 1981
- Hitachi, Ltd.
- Mamoru Sugie
- G11 - INFORMATION STORAGE
Information Patent Grant
Drive circuit for magnetic bubble device
- Patent number 4,247,911
- Issue date Jan 27, 1981
- Hitachi, Ltd.
- Shigeru Yoshizawa
- G11 - INFORMATION STORAGE