Inventor
YUMOTO KAZUMA
JP34 patents
⚠️ This page may combine multiple inventors who share the name “YUMOTO KAZUMA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
24 patentsUS7233589B2Jun 19, 2007
Communication system and communication method
HITACHI LTD160 citations98
US6778661B1Aug 17, 2004
Multimedia call distribution system
HITACHI LTD86 citations98
US5905495AMay 18, 1999
Communication system using electronic mail
HITACHI LTD96 citations98
US7337465B2Feb 26, 2008
Peer-to-peer communication apparatus and communication method
HITACHI LTD68 citations97
US6275977B1Aug 14, 2001
Application cooperation method and apparatus
HITACHI LTD131 citations97
US7813299B2Oct 12, 2010
Session control system for hierarchical relaying processes
HITACHI LTD27 citations92
US7522591B2Apr 21, 2009
Policy settable peer-to-peer session apparatus
HITACHI LTD25 citations92
US7508822B2Mar 24, 2009
Communication system and communication method
HITACHI LTD22 citations92
US7318110B2Jan 8, 2008
Storage system, storage device and information common sharing method by utilizing storage device
HITACHI LTD21 citations92
US5856825AJan 5, 1999
Image voice synchronized multimedia mail system and method thereof
HITACHI LTD39 citations92
US7984494B2Jul 19, 2011
Computer system establishing a safe communication path
HITACHI LTD7 citations84
US7764668B2Jul 27, 2010
Signaling gateway for multihop-relaying a signaling message
HITACHI LTD13 citations84
US7606914B2Oct 20, 2009
Session QoS control apparatus
HITACHI LTD15 citations84
US7882235B2Feb 1, 2011
Session control apparatus, software applied to session control apparatus, communication control method, and network system
HITACHI LTD14 citations83
US7394804B2Jul 1, 2008
Message conversion server and IP telephone
HITACHI LTD19 citations82
US7443842B2Oct 28, 2008
Communication control apparatus
HITACHI LTD8 citations73
US7668911B2Feb 23, 2010
Presence server, session control server, and packet relay system
HITACHI LTD7 citations72
US5832217ANov 3, 1998
Communication system distributing packets according to commands acquired form packets and filtering real time requests from the accepted requests and processing the realtime requests selected by the filter
HITACHI LTD5 citations63
US7801051B2Sep 21, 2010
Network system, node device and management server
HITACHI LTD3 citations62
US5758082AMay 26, 1998
Mail terminal equipment
HITACHI LTD3 citations62
US8027246B2Sep 27, 2011
Network system and node apparatus
HITACHI LTD4 citations61
US9491043B2Nov 8, 2016
Communication path switching device, communication path switching method and communication path switching program
HITACHI LTD2 citations60
US9088526B2Jul 21, 2015
Communication system and communication control device
HITACHI LTD0 citations51
US7778222B2Aug 17, 2010
Wireless IP telephone system
HITACHI LTD0 citations40
YUMOTO KAZUMA
4 patentsUS8095681B2Jan 10, 2012
Load balancing server and system
YUMOTO KAZUMA15 citations82
US8526437B2Sep 3, 2013
Communication system and communication control device
YUMOTO KAZUMA3 citations60
US8396972B2Mar 12, 2013
Session control apparatus, software applied to session control apparatus, communication control method, and network system
YUMOTO KAZUMA0 citations50
US8848522B2Sep 30, 2014
Telecommunications system and server apparatus
YUMOTO KAZUMA0 citations39