Tadahiko Ryuugou

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Fresnel lens, screen, image displaying device, lens forming mold ma...
- Patent number 7,116,476
- Issue date Oct 3, 2006
- Mitsubishi Denki Kabushiki Kaisha
- Hiroshi Suzuki
- G02 - OPTICS
Information Patent Grant
Fresnel lens, screen, image display device, lens mold manufacturing...
- Patent number 6,726,859
- Issue date Apr 27, 2004
- Mitsubishi Denki Kabushiki Kaisha
- Hiroshi Suzuki
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Fresnel lens, screen, image displaying device, lens forming mold ma...
- Publication number 20040169921
- Publication date Sep 2, 2004
- Mitsubishi Denki Kabushiki Kaisha
- Hiroshi Suzuki
- G02 - OPTICS
Information Patent Application
Fresnel , lens, screen, image display device, lens mold manufacturi...
- Publication number 20030058532
- Publication date Mar 27, 2003
- Hiroshi Suzuki
- G02 - OPTICS