Naoki Tatsumi

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Shinagawa-ku, JP

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Patents Grantslast 30 patents

Information Patent Grant
Flat light source apparatus with separable unit boards
- Patent number 8,523,391
- Issue date Sep 3, 2013
- NEC Corporation
- Masahiro Ishizuka
- F21 - LIGHTING
Information Patent Grant
Low-voltage power supply circuit for illumination, illumination dev...
- Patent number 7,781,982
- Issue date Aug 24, 2010
- NEC Lighting, Ltd.
- Naoki Tatsumi
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Drive circuit for powder type electroluminescent device with charge...
- Patent number 5,519,288
- Issue date May 21, 1996
- NEC Corporation
- Naoki Tatsumi
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
Low-voltage power supply circuit for illumination, illumination dev...
- Publication number 20070152604
- Publication date Jul 5, 2007
- NEC LIGHTING, LTD.
- Naoki Tatsumi
- H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information Patent Application
Flat light source apparatus with separable unit boards
- Publication number 20060221608
- Publication date Oct 5, 2006
- NEC Corporation
- Masahiro Ishizuka
- F21 - LIGHTING