Masachika Ooyama

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Patents Grantslast 30 patents

Information Patent Grant
High pressure mercury lamp with particular electrode structure and...
- Patent number 6,274,983
- Issue date Aug 14, 2001
- Ushiodenki Kabushiki Kaisha
- Masachika Ooyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Short arc type metal halide lamp with encapsulated rare earth metal...
- Patent number 5,973,454
- Issue date Oct 26, 1999
- Ushiodenki Kabushiki Kaisha
- Masachika Ooyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Reflector discharge lamp
- Patent number 5,957,570
- Issue date Sep 28, 1999
- Ushiodenki Kabushiki Kaisha
- Masachika Ooyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Metal halide lamp with reduced color shadowing
- Patent number 5,773,932
- Issue date Jun 30, 1998
- Ushiodenki Kabushiki Kaisha
- Masachika Ooyama
- H01 - BASIC ELECTRIC ELEMENTS