Fumio Maruyama

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Saitama, JP

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Patents Grantslast 30 patents

Information Patent Grant
Filament lamp light quantity control method and filament lamp light...
- Patent number 7,122,975
- Issue date Oct 17, 2006
- SUMITA OPTICAL GLASS, INC.
- Fumio Maruyama
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Filament lamp light source unit and filament lamp light quantity co...
- Patent number 6,815,911
- Issue date Nov 9, 2004
- Sumita Optical Glass, Inc.
- Fumio Maruyama
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR