Hiroyuki Kumasawa

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Niihama-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Optical path unit and liquid crystal display device
- Patent number 8,508,691
- Issue date Aug 13, 2013
- Sumitomo Chemical Company, Limited
- Tomonori Miyamoto
- G02 - OPTICS
Information Patent Grant
Liquid crystal display device
- Patent number 7,609,336
- Issue date Oct 27, 2009
- Sumitomo Chemical Company, Limited
- Akiyoshi Kanemitsu
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
ILLUMINATION DEVICE
- Publication number 20110188265
- Publication date Aug 4, 2011
- SUMITOMO CHEMICAL COMPANY, LIMITED
- Hiroyuki Kumasawa
- F21 - LIGHTING
Information Patent Application
OPTICAL PATH UNIT AND LIQUID CRYSTAL DISPLAY DEVICE
- Publication number 20110181810
- Publication date Jul 28, 2011
- Tomonori Miyamoto
- G02 - OPTICS
Information Patent Application
LIGHT COLLECTING SHEET-LAMINATED LIGHT DIFFUSER PLATE
- Publication number 20090129059
- Publication date May 21, 2009
- Sumitomo Chemical Company, Limited
- Hiroyuki KUMASAWA
- G02 - OPTICS
Information Patent Application
LIGHT DIFFUSER PLATE WITH LIGHT-COLLECTING LAYER
- Publication number 20090128739
- Publication date May 21, 2009
- Sumitomo Chemical Company, Limited
- Hiroyuki KUMASAWA
- G02 - OPTICS
Information Patent Application
LIGHT DIFFUSER PLATE WITH LIGHT-COLLECTING LAYER, SURFACE LIGHT SOU...
- Publication number 20090066892
- Publication date Mar 12, 2009
- Sumitomo Chemical Company, Limited
- Hiroyuki Kumasawa
- G02 - OPTICS
Information Patent Application
LIQUID CRYSTAL DISPLAY DEVICE
- Publication number 20080106679
- Publication date May 8, 2008
- Sumitomo Chemical Company, Limited
- Akiyoshi KANEMITSU
- G02 - OPTICS