Inventor
TOKUNAGA SEIJI
JP5 patents
⚠️ This page may combine multiple inventors who share the name “TOKUNAGA SEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
4 patentsUS7209472B2Apr 24, 2007
Method of controlling change-over of connection route between media gateway apparatuses, and call agent apparatus
FUJITSU LTD16 citations81
US6961331B2Nov 1, 2005
IP gateway apparatus
FUJITSU LTD15 citations78
US6665394B1Dec 16, 2003
Network call control system
FUJITSU LTD3 citations55
US6674763B1Jan 6, 2004
Method and system of seizing communication channel enhancing usability of remaining communication channels
FUJITSU LTD1 citations47