Keishi Ushijima

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Nagareyama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical radio transmission system and a method for adjusting optica...
- Patent number 5,532,858
- Issue date Jul 2, 1996
- Nit Data Communications Victor Company of Japan
- Kazutoshi Hirohashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical radio repeater with signal quality detection
- Patent number 5,349,463
- Issue date Sep 20, 1994
- Victor Company of Japan
- Kazutoshi Hirohashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Repeater system
- Patent number 5,289,306
- Issue date Feb 22, 1994
- Victor Company of Japan
- Kazutoshi Hirohashi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE