Kenji Hirai

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Yokohama-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Ridge semiconductor laser and method for manufacturing a ridge semi...
- Patent number 9,001,859
- Issue date Apr 7, 2015
- NTT Electronics Corporation
- Atsuo Kozen
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Frequency-changeable microwave signal generator having plural selec...
- Patent number 4,688,004
- Issue date Aug 18, 1987
- Kabushiki Kaisha Toshiba
- Kenji Hirai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Frequency converter
- Patent number 4,648,129
- Issue date Mar 3, 1987
- Kabushiki Kaisha Toshiba
- Kenji Hirai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Hermetically sealed microwave solid-state oscillator with dielectri...
- Patent number 4,588,964
- Issue date May 13, 1986
- Kabushiki Kaisha Toshiba
- Kenji Hirai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Microwave power amplifier/combiner
- Patent number 4,514,699
- Issue date Apr 30, 1985
- Tokyo Shibaura Denki Kabushiki Kaisha
- Keiichiro Kariatsumari
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
RIDGE SEMICONDUCTOR LASER AND METHOD FOR MANUFACTURING A RIDGE SEMI...
- Publication number 20120314727
- Publication date Dec 13, 2012
- NTT Electronics
- Atsuo Kozen
- H01 - BASIC ELECTRIC ELEMENTS