Ryusaku Imai

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Kawasaki, JP

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Patents Grantslast 30 patents

Information Patent Grant
Television conference system
- Patent number 5,206,721
- Issue date Apr 27, 1993
- Fujitsu Limited
- Youichi Ashida
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electronic conference system
- Patent number 4,654,483
- Issue date Mar 31, 1987
- Fujitsu Limited
- Ryusaku Imai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Color information input system for electronic blackboard
- Patent number 4,501,931
- Issue date Feb 26, 1985
- Fujitsu Limited
- Nobumasa Ohya
- G06 - COMPUTING CALCULATING COUNTING