Inventor
KUWAHARA HIROSHI
62 patents
⚠️ This page may combine multiple inventors who share the name “KUWAHARA HIROSHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
39 patentsUS5128981AJul 7, 1992
Radio communication system and a portable wireless terminal
HITACHI LTD339 citations99
US5379451AJan 3, 1995
Mobile communication system and location registration method in mobile communication system
HITACHI LTD299 citations98
US4947388AAug 7, 1990
Cell switching system of asynchronous transfer mode
HITACHI LTD149 citations98
US5513177AApr 30, 1996
Distributed switching system having at least one module
HITACHI LTD41 citations96
US5157660AOct 20, 1992
Communication system including portable terminals and fixed terminals
HITACHI LTD115 citations96
US5043979AAug 27, 1991
Time-division channel arrangement
HITACHI LTD31 citations96
US4964119AOct 16, 1990
Method and system for packet exchange
HITACHI LTD87 citations96
US4910731AMar 20, 1990
Switching system and method of construction thereof
HITACHI LTD79 citations96
US6285675B1Sep 4, 2001
ATM cell switching system
HITACHI LTD15 citations92
US6016317AJan 18, 2000
ATM cell switching system
HITACHI LTD18 citations92
US5999162ADec 7, 1999
Graph displaying method and apparatus and processing operation monitoring apparatus
HITACHI LTD52 citations92
US5740156AApr 14, 1998
Packet switching system having self-routing switches
HITACHI LTD37 citations92
US5111323AMay 5, 1992
Optical switching system
HITACHI LTD50 citations92
US4543652ASep 24, 1985
Time-division switching unit
HITACHI LTD31 citations92
US4305133ADec 8, 1981
Recursive type digital filter
HITACHI LTD32 citations92
US5838770ANov 17, 1998
Portable telephone system
HITACHI LTD19 citations90
US5579370ANov 26, 1996
Portable telephone system
HITACHI LTD27 citations90
US4401365AAug 30, 1983
Rotary type optical switch
HITACHI LTD43 citations89
US6335934B1Jan 1, 2002
Distributed type switching system
HITACHI LTD9 citations82
US6304570B1Oct 16, 2001
Distributed type switching system
HITACHI LTD9 citations82
US6215788B1Apr 10, 2001
ATM cell switching system
HITACHI LTD11 citations82
US5995510ANov 30, 1999
Distributed type switching system
HITACHI LTD9 citations82
US5734655AMar 31, 1998
Distributed type switching system
HITACHI LTD9 citations82
US4633460ADec 30, 1986
Time division switching system
HITACHI LTD21 citations82
US4337518AJun 29, 1982
Recursive-type digital filter with reduced round-off noise
HITACHI LTD24 citations82
US4401922AAug 30, 1983
Convergence distortion correction method and apparatus for color cathode-ray tube
HITACHI LTD24 citations81
US6728242B2Apr 27, 2004
ATM cell switching system
HITACHI LTD2 citations74
US6639920B2Oct 28, 2003
Distributed type switching system
HITACHI LTD4 citations74
US6618372B1Sep 9, 2003
Packet switching system having-having self-routing switches
HITACHI LTD7 citations74
US6445703B2Sep 3, 2002
ATM cell switching system
HITACHI LTD7 citations74
US6389025B2May 14, 2002
Distributed type switching system
HITACHI LTD5 citations74
US6314096B1Nov 6, 2001
Packet switching system having self-routing switches
HITACHI LTD11 citations74
US5999537ADec 7, 1999
Packet switching system having self-routing switches
HITACHI LTD5 citations74
US5745495AApr 28, 1998
Apparatus for monitoring and controlling autonomous switching of trunk/subscriber lines in a distributed switching system
HITACHI LTD6 citations74
US5469189ANov 21, 1995
Display apparatus and method with multi-window function
HITACHI LTD17 citations74
US7509466B2Mar 24, 2009
Backup method for a copy pair using newly created logical volume via virtual server device
HITACHI LTD2 citations63
US6005867ADec 21, 1999
Time-division channel arrangement
HITACHI LTD3 citations63
US4080516AMar 21, 1978
Multi-frequency signal receiver
HITACHI LTD6 citations63
US4365309ADec 21, 1982
Digital differential analyzing processor
HITACHI LTD5 citations62
FUJITSU LTD
2 patentsFUJITSU OPTICAL COMPONENTS LTD
2 patentsKUWAHARA HIROSHI
2 patentsNISHIMOTO HIROSHI
1 patentNIPPON TELEGRAPH & TELEPHONE
1 patentNGK INSULATORS LTD
1 patentMITSUBISHI ELECTRIC CORP
1 patentMURATA MANUFACTURING CO
1 patentShowing the top 50 of 62 patents by PatentIndex Score.