Inventor
TAKEUCHI KIMITOSHI
JP8 patents
Patents
8 patentsUS7532606B2May 12, 2009
DTMF signal transmission method and communication apparatus
HITACHI TELECOMM TECH4 citations72
US7062033B2Jun 13, 2006
DTMF signal transmission method and communication apparatus
HITACHI TELECOMM TECH5 citations72
US6700973B1Mar 2, 2004
System for transmitting DTMF signal and communication equipment thereof
HITACHI TELECOMM TECH4 citations72
US7103036B2Sep 5, 2006
Voice data relay apparatus
HITACHI TELECOMM TECH2 citations62
US7050570B2May 23, 2006
DTMF signal transmission method and communication apparatus
HITACHI TELECOMM TECH1 citations61
US6810014B1Oct 26, 2004
ATM multiplex apparatus and congestion reporting method
HITACHI TELECOMM TECH2 citations56
US7058060B2Jun 6, 2006
ATM apparatus, IP apparatus and bus system
HITACHI TELECOMM TECH6 citations53
US7050438B1May 23, 2006
Cell creation method for control line signals of ATM Network and multiplexing equipment
HITACHI TELECOMM TECH0 citations46