Inventor
ISOMURA AKIHIKO
JP17 patents
⚠️ This page may combine multiple inventors who share the name “ISOMURA AKIHIKO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
12 patentsUS7277608B2Oct 2, 2007
Optical transmitter
FUJITSU LTD22 citations92
US7877025B2Jan 25, 2011
Phase monitor apparatus, phase control apparatus and methods thereof for optical DQPSK receiver
FUJITSU LTD8 citations84
US7853148B2Dec 14, 2010
Optical add/drop multiplexer
FUJITSU LTD10 citations84
US7792428B2Sep 7, 2010
Optical add/drop multiplexer
FUJITSU LTD12 citations84
US7711270B2May 4, 2010
Optical node and optical add/drop multiplexer
FUJITSU LTD8 citations84
US7860408B2Dec 28, 2010
Interferometer for demodulating differential M-phase shift keying signal
FUJITSU LTD9 citations83
US7676162B2Mar 9, 2010
Phase monitor used in optical receiver
FUJITSU LTD11 citations83
US7684713B2Mar 23, 2010
Phase control apparatus and optical DQPSK receiver
FUJITSU LTD9 citations82
US7933522B2Apr 26, 2011
Optical signal transmission system and optical signal transmission method
FUJITSU LTD2 citations62
US7689074B2Mar 30, 2010
Optical reception apparatus compatible with DQPSK polarization multiplexing format
FUJITSU LTD3 citations62
US7616900B2Nov 10, 2009
Optical signal degradation compensator
FUJITSU LTD5 citations62
US7613366B2Nov 3, 2009
Polarization mode dispersion compensator and polarization mode dispersion compensating method
FUJITSU LTD2 citations62
SUMITOMO ELECTRIC INDUSTRIES
4 patentsUS4539113ASep 3, 1985
Fluororesin filter
SUMITOMO ELECTRIC INDUSTRIES32 citations89
US5080001AJan 14, 1992
Resin molded product, method of producing same, and air vent device using same
SUMITOMO ELECTRIC INDUSTRIES13 citations73
US4844953AJul 4, 1989
Elastic roller for fixing and method of producing the same
SUMITOMO ELECTRIC INDUSTRIES13 citations73
US4822615AApr 18, 1989
Antithrombic resin composition
SUMITOMO ELECTRIC INDUSTRIES7 citations73