Inventor
SUDO SHIGEYUKI
JP19 patents
⚠️ This page may combine multiple inventors who share the name “SUDO SHIGEYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
16 patentsUS5493710AFeb 20, 1996
Communication system having oscillation frequency calibrating function
HITACHI LTD99 citations96
US5450613ASep 12, 1995
Mobile communications equipment which detects and notifies when it is moved into or out of a service area
HITACHI LTD195 citations95
US7035309B2Apr 25, 2006
Receiver for receiving a spectrum dispersion signal
HITACHI LTD15 citations92
US6625202B1Sep 23, 2003
Mobile station for spread spectrum communication
HITACHI LTD40 citations92
US6363101B1Mar 26, 2002
Receiver for receiving a spectrum dispersion signal
HITACHI LTD22 citations92
US5778314AJul 7, 1998
Speech message recording and reproducing method and apparatus
HITACHI LTD22 citations92
US7397777B1Jul 8, 2008
Handoff control method and a mobile station employing the same
HITACHI LTD10 citations82
US7953406B2May 31, 2011
Access point
HITACHI LTD12 citations78
US7471715B2Dec 30, 2008
Receiver for receiving a spectrum dispersion signal
HITACHI LTD6 citations73
US7400667B2Jul 15, 2008
Receiver for receiving a spectrum dispersion signal
HITACHI LTD4 citations73
US5361047ANov 1, 1994
PI/4 shift QPSK modulator and communication apparatus used therewith
HITACHI LTD13 citations73
US5210775AMay 11, 1993
π/4 shift QPSK modulator and communication apparatus
HITACHI LTD13 citations70
US7447256B2Nov 4, 2008
Receiver for receiving a spectrum dispersion signal
HITACHI LTD2 citations62
US7269203B2Sep 11, 2007
Receiver for receiving a spectrum dispersion signal
HITACHI LTD2 citations62
US5696792ADec 9, 1997
Digital radiocommunication terminal
HITACHI LTD6 citations62
US7606198B2Oct 20, 2009
Handoff control method and a mobile station employing the same
HITACHI LTD0 citations51