Inventor
DOI NOBUKAZU
JP91 patents
⚠️ This page may combine multiple inventors who share the name “DOI NOBUKAZU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
49 patentsUS7082321B2Jul 25, 2006
Radio communication system using adaptive array antenna
HITACHI LTD213 citations99
US6269088B1Jul 31, 2001
CDMA mobile communication system and communication method
HITACHI LTD181 citations99
US6141335AOct 31, 2000
Radio communication system
HITACHI LTD202 citations99
US5870393AFeb 9, 1999
Spread spectrum communication system and transmission power control method therefor
HITACHI LTD267 citations99
US5559790ASep 24, 1996
Spread spectrum communication system and transmission power control method therefor
HITACHI LTD238 citations99
US6704547B2Mar 9, 2004
Wireless communication base station transmission timing offset correction system
HITACHI LTD78 citations98
US6597678B1Jul 22, 2003
Radio communication system using adaptive array antenna
HITACHI LTD106 citations98
US6570865B2May 27, 2003
CDMA mobile communications system and communication method
HITACHI LTD94 citations98
US6307844B1Oct 23, 2001
CDMA communication system and its transmission power control method
HITACHI LTD90 citations98
US5499395AMar 12, 1996
Cellular mobile communication system having apparatus for changing boundaries of cells according to traffic condition
HITACHI LTD103 citations98
US6900753B2May 31, 2005
Method for measuring distance and position using spread spectrum signal, and an equipment using the method
HITACHI LTD57 citations96
US6804216B1Oct 12, 2004
Code division multiple access communication method using dynamic code assignment, and a base station performing the method
HITACHI LTD63 citations96
US6647276B1Nov 11, 2003
Antenna unit and radio base station therewith
HITACHI LTD56 citations96
US6483816B2Nov 19, 2002
CDMA communication system and its transmission power control method
HITACHI LTD61 citations96
US6459402B1Oct 1, 2002
Method for measuring distance and position using spectrum signal, and an equipment using the method
HITACHI LTD66 citations96
US6377613B1Apr 23, 2002
Communication apparatus for code division multiple accessing mobile communications system
HITACHI LTD63 citations96
US6335924B1Jan 1, 2002
Spread spectrum communication system and transmission power control method therefor
HITACHI LTD35 citations96
US6175744B1Jan 16, 2001
Transmission power control method and apparatus for mobile communication system
HITACHI LTD54 citations96
US5943329AAug 24, 1999
Code division multiple access mobile communication system
HITACHI LTD50 citations96
US5047852ASep 10, 1991
Adaptive transform encoder for digital image signal in recording/reproducing apparatus
HITACHI LTD77 citations96
US6694142B1Feb 17, 2004
Wireless terminal positioning method and apparatus
HITACHI LTD70 citations95
US5930244AJul 27, 1999
CDMA Communication system and method
HITACHI LTD46 citations95
US7013147B1Mar 14, 2006
Wireless positioning means, wireless positioning apparatus and mobile position control center apparatus
HITACHI LTD44 citations93
US6657579B2Dec 2, 2003
Method for measuring distance and position using spread spectrum signal, and an equipment using the method
HITACHI LTD17 citations93
US5579374ANov 26, 1996
Independent cell system of forward and reverse links
HITACHI LTD33 citations93
US7167712B2Jan 23, 2007
Method, system, and apparatus for detecting a position of a terminal in a network
HITACHI LTD39 citations92
US7154875B2Dec 26, 2006
CDMA mobile communication system and communication method
HITACHI LTD15 citations92
US7116992B1Oct 3, 2006
Mobile station using positional information
HITACHI LTD24 citations92
US6920122B1Jul 19, 2005
Control method of channel assign
HITACHI LTD40 citations92
US6731905B2May 4, 2004
Fixed wireless access system and apparatus therefor
HITACHI LTD47 citations92
US6546260B2Apr 8, 2003
Transmission power control method and apparatus for mobile communication system
HITACHI LTD26 citations92
US6393013B1May 21, 2002
CDMA mobile communication system and communication method
HITACHI LTD27 citations92
US6292477B1Sep 18, 2001
Code division multiple access mobile communication system
HITACHI LTD15 citations92
US6144694ANov 7, 2000
Transmitting apparatus for code division multiplexed signals
HITACHI LTD29 citations92
US6141337AOct 31, 2000
Spread spectrum communication system
HITACHI LTD54 citations92
US6111869AAug 29, 2000
Method of mobile communication and apparatus therefor
HITACHI LTD27 citations92
US6049536AApr 11, 2000
CDMA communication method and spread spectrum communication system
HITACHI LTD29 citations92
US5666352ASep 9, 1997
CDMA mobile communication system and method with improved phase correction features
HITACHI LTD51 citations92
US4963992AOct 16, 1990
Apparatus for recording/reproducing digital video signals in both a standard mode and a long playing mode
HITACHI LTD30 citations92
US4764927AAug 16, 1988
Code error correcting method
HITACHI LTD41 citations92
US4653052AMar 24, 1987
Method for decoding double-encoding codes and apparatus using the same
HITACHI LTD52 citations92
US6597676B1Jul 22, 2003
CDMA communication system and method
HITACHI LTD18 citations91
US7203462B2Apr 10, 2007
Antenna unit and radio base station therewith
HITACHI LTD10 citations84
US6754255B1Jun 22, 2004
Mobile terminal, a base station, and a synchronization control method
HITACHI LTD14 citations84
US7016665B2Mar 21, 2006
Charging method and terminal equipment in the information and communication network system
HITACHI LTD11 citations83
US6675007B2Jan 6, 2004
Charging method and terminal equipment in the information and communication network system
HITACHI LTD14 citations83
US6456609B2Sep 24, 2002
Code division multiple access mobile communication system
HITACHI LTD13 citations82
US6137786AOct 24, 2000
CDMA communication system and method
HITACHI LTD12 citations81
US7609197B2Oct 27, 2009
Method for measuring distance and position using spread spectrum signal, and an equipment using the method
HITACHI LTD4 citations74
HITACHI COMM TECH LTD
1 patentShowing the top 50 of 91 patents by PatentIndex Score.