Inventor
YAMASAKI RYOTA
JP17 patents
⚠️ This page may combine multiple inventors who share the name “YAMASAKI RYOTA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
9 patentsUS7167712B2Jan 23, 2007
Method, system, and apparatus for detecting a position of a terminal in a network
HITACHI LTD39 citations92
US7139583B2Nov 21, 2006
Positioning system and method based on time difference of arrival
HITACHI LTD24 citations92
US7138946B2Nov 21, 2006
System and method for position detection of a terminal in a network
HITACHI LTD37 citations92
US7848766B2Dec 7, 2010
Wireless terminal position detecting method and system therefor
HITACHI LTD14 citations84
US7353032B2Apr 1, 2008
Method, system, and apparatus for detecting a position of a terminal in a network
HITACHI LTD5 citations63
US7890118B2Feb 15, 2011
Method, system and apparatus for detecting a position of a terminal in a network
HITACHI LTD6 citations62
US7509139B2Mar 24, 2009
Method for selecting base station
HITACHI LTD3 citations62
US7345630B2Mar 18, 2008
System and method for position detection of a terminal in a network
HITACHI LTD5 citations62
US7266098B2Sep 4, 2007
Wireless position measurement method and wireless position measurement system
HITACHI LTD3 citations61
HITACHI CONSTRUCTION MACH CO
4 patentsUS9473885B2Oct 18, 2016
Fleet management server, onboard terminal equipment, and fleet management system
HITACHI CONSTRUCTION MACH CO3 citations71
US10089873B2Oct 2, 2018
Vehicle travel route control system and fleet management server
HITACHI CONSTRUCTION MACH CO7 citations70
US10244456B2Mar 26, 2019
Wireless communication system, control server, and base-station switching operation control method
HITACHI CONSTRUCTION MACH CO1 citations61
US10140871B2Nov 27, 2018
Wireless system and operation management server
HITACHI CONSTRUCTION MACH CO0 citations41