Atushi Katayama

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Digital watermark padding method, digital watermark padding device,...
- Patent number 8,126,202
- Issue date Feb 28, 2012
- Nippon Telegraph and Telephone Corporation
- Takao Nakamura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital watermark padding method, digital watermark padding device,...
- Patent number 7,970,164
- Issue date Jun 28, 2011
- Nippon Telegraph and Telephone Corporation
- Takao Nakamura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Electronic watermark embedding device, electronic watermark detecti...
- Patent number 7,672,474
- Issue date Mar 2, 2010
- Nippon Telegraph and Telephone Corporation
- Takao Nakamura
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Electronic watermark embedding device, electronic watermark detecti...
- Patent number 7,489,796
- Issue date Feb 10, 2009
- Nippon Telegraph and Telephone Corporation
- Takao Nakamura
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
DIGITAL WATERMARK PADDING METHOD, DIGITAL WATERMARK PADDING DEVICE,...
- Publication number 20110228972
- Publication date Sep 22, 2011
- NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Takao NAKAMURA
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Electronic Watermark Embedding Device, Electronic Watermark Detecti...
- Publication number 20080137903
- Publication date Jun 12, 2008
- KYOWA HAKKO KOGYO CO., LTD
- Takao Nakamura
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Application
Digital Watermark Padding Method, Digital Watermark Padding Device,...
- Publication number 20080089552
- Publication date Apr 17, 2008
- NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Takao Nakamura
- G06 - COMPUTING CALCULATING COUNTING