Masao Katsumata

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Illumination optical unit liquid crystal projector and production m...
- Patent number 7,198,376
- Issue date Apr 3, 2007
- Sony Corporation
- Masao Katsumata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Prism, projection and optical component
- Patent number 7,130,120
- Issue date Oct 31, 2006
- Sony Corporation
- Masao Katsumata
- G02 - OPTICS
Information Patent Grant
Illuminating optical system, image display unit and method of illum...
- Patent number 6,921,176
- Issue date Jul 26, 2005
- Sony Corporation
- Hideo Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Prism, projection device and optical component
- Patent number 6,829,090
- Issue date Dec 7, 2004
- Sony Corporation
- Masao Katsumata
- G02 - OPTICS
Information Patent Grant
Projection apparatus
- Patent number 6,648,474
- Issue date Nov 18, 2003
- Sony Corporation
- Masao Katsumata
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Projection apparatus with a polarizer, glass panel, and quarter-wav...
- Patent number 5,844,637
- Issue date Dec 1, 1998
- Sony Corporation
- Masao Katsumata
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Prism, projection and optical component
- Publication number 20050063060
- Publication date Mar 24, 2005
- Masao Katsumata
- G02 - OPTICS
Information Patent Application
Illuminating optical system, image display unit and method of illum...
- Publication number 20040196443
- Publication date Oct 7, 2004
- Hideo Tomita
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Illumination optical unit liquid crystal projector and production m...
- Publication number 20040046942
- Publication date Mar 11, 2004
- Masao Katsumata
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Prism, projection device and optical component
- Publication number 20030081317
- Publication date May 1, 2003
- Masao Katsumata
- G02 - OPTICS
Information Patent Application
Projection apparatus
- Publication number 20030058411
- Publication date Mar 27, 2003
- Masao Katsumata
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY