Inventor
YAMAZAKI SHUNTARO
JP30 patents
⚠️ This page may combine multiple inventors who share the name “YAMAZAKI SHUNTARO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
21 patentsUS6025945AFeb 15, 2000
Optical transmitter/receiver and a network using such optical transmitter/receivers
NEC CORP63 citations96
US5872644AFeb 16, 1999
Fiber-optic access system for subscriber optical communication
NEC CORP55 citations96
US7486635B2Feb 3, 2009
Network service information providing system and network service information providing apparatus and method and terminal thereof
NEC CORP21 citations93
US7158769B2Jan 2, 2007
Device and method for alerting user to interference
NEC CORP30 citations93
US7013150B2Mar 14, 2006
Positioning system, positioning server, base station and terminal location estimation method
NEC CORP33 citations93
US5896213AApr 20, 1999
Optical fiber network system
NEC CORP52 citations92
US5600469AFeb 4, 1997
Optical network unit implemented with low-cost line interface cards
NEC CORP54 citations92
US5191457AMar 2, 1993
Wdm optical communication wherein optical beams are modulated by channel discrimination signals of different frequencies by data signals
NEC CORP50 citations92
US5023946AJun 11, 1991
Polarization diversity optical heterodyne receiver with phase adjustment of two I.F. signals for control of a local optical source
NEC CORP26 citations92
US4903342AFeb 20, 1990
Optical heterodyne homodyne detection apparatus
NEC CORP25 citations92
US6950408B1Sep 27, 2005
Speed converter for IEEE-1394 serial bus network
NEC CORP35 citations91
US6678477B1Jan 13, 2004
Spatial transmission optical transceiver
NEC CORP11 citations74
US5442476AAug 15, 1995
Optical communication method
NEC CORP16 citations74
US5013116AMay 7, 1991
Polarization control of bidirectionally transmitted beams by a single polarization controller
NEC CORP15 citations74
US4912527AMar 27, 1990
Optical apparatus for pulling an intermediate frequency in a predetermined frequency range
NEC CORP15 citations74
US4700352AOct 13, 1987
FSK laser transmitting apparatus
NEC CORP18 citations72
US5764394AJun 9, 1998
Interface device
NEC CORP11 citations70
US7020461B2Mar 28, 2006
Propagation environment notification methods and notification systems in radio communication systems, and record media recording control programs thereof
NEC CORP6 citations63
US5046140ASep 3, 1991
Automatic optical frequency acquisition and tracking apparatus for optical coherent communication system
NEC CORP4 citations63
US5031998AJul 16, 1991
Polarization control on signal beams for principal-state bidirectional transmission through an optical fiber
NEC CORP6 citations63
US5007693AApr 16, 1991
Method for controlling polarizations of signal lights in an optical frequency division multiplex coherent communication system
NEC CORP3 citations62