Inventor
TAKAHARA YASUAKI
JP17 patents
⚠️ This page may combine multiple inventors who share the name “TAKAHARA YASUAKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
15 patentsUS5493710AFeb 20, 1996
Communication system having oscillation frequency calibrating function
HITACHI LTD99 citations96
US6275690B1Aug 14, 2001
Cellular mobile telephone apparatus
HITACHI LTD51 citations95
US5450613ASep 12, 1995
Mobile communications equipment which detects and notifies when it is moved into or out of a service area
HITACHI LTD195 citations95
US6799034B2Sep 28, 2004
Response message transmitter and response message transmitting method in cellular mobile telephone apparatus and recording medium recording program for executing the method
HITACHI LTD18 citations92
US6539218B2Mar 25, 2003
Message transmitter and response message transmitting method in cellular mobile telephone apparatus and recording medium recording program for executing the method
HITACHI LTD26 citations92
US5778314AJul 7, 1998
Speech message recording and reproducing method and apparatus
HITACHI LTD22 citations92
US6697647B2Feb 24, 2004
Cellular mobile telephone apparatus and an alarm device therefor
HITACHI LTD22 citations90
US6377823B1Apr 23, 2002
Cellular mobile telephone apparatus and an alarm device therefor
HITACHI LTD33 citations90
US4773026ASep 20, 1988
Picture display memory system
HITACHI LTD33 citations89
US6823182B1Nov 23, 2004
Cellular mobile telephone apparatus
HITACHI LTD11 citations73
US5361047ANov 1, 1994
PI/4 shift QPSK modulator and communication apparatus used therewith
HITACHI LTD13 citations73
US6032058AFeb 29, 2000
Cellular mobile telephone apparatus and an alarm device therefor
HITACHI LTD13 citations71
US5210775AMay 11, 1993
π/4 shift QPSK modulator and communication apparatus
HITACHI LTD13 citations70
US5850601ADec 15, 1998
Cordless telephone apparatus
HITACHI LTD9 citations68
US5696792ADec 9, 1997
Digital radiocommunication terminal
HITACHI LTD6 citations62