Masafumi Hamatake

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Method, apparatus, and computer product for embedding an electronic...
- Patent number 7,769,200
- Issue date Aug 3, 2010
- Ricoh Company, Limited
- Masafumi Hamatake
- G06 - COMPUTING CALCULATING COUNTING

Patents Applicationslast 30 patents

Information Patent Application
Method and apparatus detecting alteration in image, and computer pr...
- Publication number 20060077419
- Publication date Apr 13, 2006
- Yoko Sugiura
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Method and apparatus for embedding electronic watermark, and comput...
- Publication number 20060078159
- Publication date Apr 13, 2006
- Masafumi Hamatake
- G06 - COMPUTING CALCULATING COUNTING