Shigeru Okada

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Yokohama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Discharge lamp
- Patent number 5,049,781
- Issue date Sep 17, 1991
- Toshiba Lighting & Technology Corporation
- Hitoshi Imamura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Gain control circuit
- Patent number 4,134,078
- Issue date Jan 9, 1979
- Hitachi, Ltd.
- Takao Arai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Gain control circuit
- Patent number 4,101,841
- Issue date Jul 18, 1978
- Hitachi, Ltd.
- Shigeru Okada
- H03 - BASIC ELECTRONIC CIRCUITRY