Yoji Arai

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Ome, JP

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Patents Grantslast 30 patents

Information Patent Grant
High-pressure discharge lamp operating circuit
- Patent number 4,803,406
- Issue date Feb 7, 1989
- Hitachi, Ltd.
- Makoto Yasuda
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Discharge lamp with neon gas in outer tube
- Patent number 4,622,485
- Issue date Nov 11, 1986
- Hitachi, Ltd.
- Tsune Miyashita
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
High-pressure discharge lamp operating circuit
- Patent number 4,587,460
- Issue date May 6, 1986
- Hitachi, Ltd.
- Seiichi Murayama
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Spectral source, particularly for atomic absorption spectrometry
- Patent number 4,366,418
- Issue date Dec 28, 1982
- Hitachi, Ltd.
- Shinji Mayama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Spectral source, particularly for atomic absorption spectrometry
- Patent number 4,198,589
- Issue date Apr 15, 1980
- Hitachi, Ltd.
- Shinji Mayama
- H01 - BASIC ELECTRIC ELEMENTS