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Keisuke Ichikawa
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Yokohama-shi, JP
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last 30 patents
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Patent Grant
Time stamping system for electronic documents and program medium fo...
Patent number
7,266,698
Issue date
Sep 4, 2007
Amano Corporation
Tsutomu Matsumoto
G06 - COMPUTING CALCULATING COUNTING
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last 30 patents
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Patent Application
Time stamping system for electronic documents and program medium fo...
Publication number
20030159048
Publication date
Aug 21, 2003
Tsutomu Matsumoto
G06 - COMPUTING CALCULATING COUNTING