Satoshi Kumayasu

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical submarine communication system and surge suppressing appara...
- Patent number 7,058,305
- Issue date Jun 6, 2006
- Mitsubishi Denki Kabushiki Kaisha
- Katsuhiko Horinouchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Circuit for switching optical paths
- Patent number 6,934,434
- Issue date Aug 23, 2005
- Mitsubishi Denki Kabushiki Kaisha
- Satoshi Kumayasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical variable attenuator
- Patent number 6,792,192
- Issue date Sep 14, 2004
- Mitsubishi Denki Kabushiki Kaisha
- Satoshi Kumayasu
- G02 - OPTICS
Information Patent Grant
Electric power feeding line switching method, electric power feedin...
- Patent number 6,714,394
- Issue date Mar 30, 2004
- Mitsubishi Denki Kabushiki Kaisha
- Satoshi Kumayasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Feed line switching circuit and branching unit
- Patent number 6,563,236
- Issue date May 13, 2003
- Mitsubishi Denki Kabushiki Kaisha
- Satoshi Kumayasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Optical submarine communication system
- Publication number 20030151521
- Publication date Aug 14, 2003
- Mitsubishi Denki Kabushiki Kaisha
- Katsuhiko Horinouchi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Feed line switching cirucuit and branching unit
- Publication number 20030015921
- Publication date Jan 23, 2003
- MITSUBISHI DENKI KABUSHIKI KAISHA
- Satoshi Kumayasu
- H04 - ELECTRIC COMMUNICATION TECHNIQUE