Inventor
KOYAMA TOSHIAKI
JP14 patents
⚠️ This page may combine multiple inventors who share the name “KOYAMA TOSHIAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
9 patentsUS6078583AJun 20, 2000
Communication method and communication system
HITACHI LTD193 citations98
US5905495AMay 18, 1999
Communication system using electronic mail
HITACHI LTD96 citations98
US5654957AAug 5, 1997
Packet communication system
HITACHI LTD186 citations98
US5434863AJul 18, 1995
Internetworking apparatus for connecting plural network systems and communication network system composed of plural network systems mutually connected
HITACHI LTD165 citations98
US5211031AMay 18, 1993
Scroll type compressor and refrigeration cycle using the same
HITACHI LTD85 citations92
US4849962AJul 18, 1989
Communications control unit
HITACHI LTD17 citations73
US6563815B1May 13, 2003
Packet communication system
HITACHI LTD3 citations62
US5758082AMay 26, 1998
Mail terminal equipment
HITACHI LTD3 citations62
US7139265B2Nov 21, 2006
Packet communication system
HITACHI LTD0 citations51
KOYAMA TOSHIAKI
3 patentsUS9471592B2Oct 18, 2016
File management system, method and computer program
KOYAMA TOSHIAKI4 citations65
US9400804B2Jul 26, 2016
File management system, method and computer program
KOYAMA TOSHIAKI0 citations34
US8934610B2Jan 13, 2015
File management system, method and computer program
KOYAMA TOSHIAKI0 citations34