Hirozi Shoyama

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Yokohama, JA

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Patents Grantslast 30 patents

Information Patent Grant
Rat-race mixer circuit
- Patent number 4,008,438
- Issue date Feb 15, 1977
- Hitachi, Ltd.
- Keiro Shinkawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Multi-channel frequency converter having automatic control
- Patent number 3,944,931
- Issue date Mar 16, 1976
- Hitachi, Ltd.
- Noboru Usami
- H04 - ELECTRIC COMMUNICATION TECHNIQUE