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Patent applications and USPTO patent grants for Tahara; Yasufumi.The latest application filed is for "telephone switchboard apparatus and method of controlling the same".
Patent | Date |
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Telephone switchboard apparatus and method of controlling the same App 20070019628 - Tahara; Yasufumi | 2007-01-25 |
Data transmission system, and node equipment and network management equipment used in the same Grant 7,123,582 - Tahara , et al. October 17, 2 | 2006-10-17 |
Network telephony system and control method for use in the network telephony system App 20050100003 - Tahara, Yasufumi | 2005-05-12 |
Data transmission system, and node equipment and network management equipment used in the same App 20020064127 - Tahara, Yasufumi ;   et al. | 2002-05-30 |
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