Etsumi Fujita

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Chiba, JP

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Patents Grantslast 30 patents

Information Patent Grant
Spread spectrum communication system and transmitter-receiver
- Patent number 5,504,776
- Issue date Apr 2, 1996
- Sony Corporation
- Tomoya Yamaura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Spread spectrum communication system and transmitter-receiver
- Patent number 5,321,721
- Issue date Jun 14, 1994
- Sony Corporation
- Tomoya Yamaura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital terminal address transmitting for CATV
- Patent number 4,684,981
- Issue date Aug 4, 1987
- Sony Corporation
- Masakatsu Toyoshima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Waveform shaping apparatus
- Patent number 4,646,327
- Issue date Feb 24, 1987
- Sony Corporation
- Yuichi Kojima
- H04 - ELECTRIC COMMUNICATION TECHNIQUE