Inventor
ROKUGAWA HIROYUKI
JP18 patents
⚠️ This page may combine multiple inventors who share the name “ROKUGAWA HIROYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
16 patentsUS6242870B1Jun 5, 2001
Light emitting device driving circuit
FUJITSU LTD59 citations94
US6975813B1Dec 13, 2005
Light output control device
FUJITSU LTD27 citations92
US6256329B1Jul 3, 2001
Semiconductor laser driver circuit
FUJITSU LTD48 citations92
US5715075AFeb 3, 1998
Optical processing device operating in a wavelength-synchronized mode and an optical circuit exchanger that uses such an optical processing device
FUJITSU LTD26 citations92
US5337323AAug 9, 1994
Integrated semiconductor laser array apparatus
FUJITSU LTD32 citations92
US5274487ADec 28, 1993
Photonic switching system
FUJITSU LTD23 citations92
US7119617B2Oct 10, 2006
Differential amplifier
FUJITSU LTD7 citations74
US5923455AJul 13, 1999
Data identifying device and light receiver using the same
FUJITSU LTD15 citations73
US5848084ADec 8, 1998
Semiconductor light source for an optical transmitter and an optical transmission module using the semiconductor light source
FUJITSU LTD11 citations73
US5796792AAug 18, 1998
Data identifying device and light receiver using the same
FUJITSU LTD6 citations73
US5740210AApr 14, 1998
Data discriminating circuit and a parallel data receiver using the same
FUJITSU LTD12 citations73
US5657144AAug 12, 1997
Optical processing device operating in a wavelength-synchronized mode and an optical circuit exchanger that uses such an optical processing device
FUJITSU LTD16 citations73
US5473636ADec 5, 1995
Data discriminating circuit and an optical receiver using the same
FUJITSU LTD7 citations73
US5165077ANov 17, 1992
Optical drop-and-insert apparatus
FUJITSU LTD13 citations73
US6078150AJun 20, 2000
Light-emitting element driving circuit and device using the same
FUJITSU LTD15 citations71
US7266308B2Sep 4, 2007
Light output control circuit
FUJITSU LTD0 citations51