Inventor
KAJI TADASHI
JP23 patents
⚠️ This page may combine multiple inventors who share the name “KAJI TADASHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
14 patentsUS6327658B1Dec 4, 2001
Distributed object system and service supply method therein
HITACHI LTD36 citations91
US8010793B2Aug 30, 2011
Data communication method and system
HITACHI LTD13 citations84
US7697692B2Apr 13, 2010
Cryptographic communication system and method
HITACHI LTD19 citations84
US7443986B2Oct 28, 2008
Key allocating method and key allocation system for encrypted communication
HITACHI LTD9 citations84
US8019996B2Sep 13, 2011
Method for encrypted communication with a computer system and system therefor
HITACHI LTD11 citations83
US7657035B2Feb 2, 2010
Encryption communication method and system
HITACHI LTD16 citations83
US7533269B2May 12, 2009
Digital-signed digital document exchange supporting method and information processor
HITACHI LTD16 citations83
US7720227B2May 18, 2010
Encryption method for SIP message and encrypted SIP communication system
HITACHI LTD7 citations73
US8041822B2Oct 18, 2011
Service network system and server device
HITACHI LTD3 citations62
US7984290B2Jul 19, 2011
System and method for encrypted communication
HITACHI LTD4 citations62
US7558952B2Jul 7, 2009
Method and apparatus for accelerating public-key certificate validation
HITACHI LTD5 citations61
US7392380B2Jun 24, 2008
Authentication and authorization infrastructure system with CRL issuance notification function
HITACHI LTD5 citations58
US7940780B2May 10, 2011
Data communication system enabling data communication between communication devices through a server
HITACHI LTD4 citations56
US12563040B2Feb 24, 2026
Data circulation control method, data circulation control system, and approval server
HITACHI LTD0 citations50
TAKATA OSAMU
3 patentsUS8218769B2Jul 10, 2012
Encrypted communication system, communication status management server, encrypted communication method, and communication status management method
TAKATA OSAMU6 citations71
US8081758B2Dec 20, 2011
Communication support server, communication support method, and communication support system
TAKATA OSAMU2 citations61
US8238555B2Aug 7, 2012
Management server, communication apparatus and program implementing key allocation system for encrypted communication
TAKATA OSAMU0 citations50