Inventor
TAKATSU KAZUO
JP19 patents
⚠️ This page may combine multiple inventors who share the name “TAKATSU KAZUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FUJITSU LTD
16 patentsUS6441955B1Aug 27, 2002
Light wavelength-multiplexing systems
FUJITSU LTD49 citations95
US5557437ASep 17, 1996
Optical terminal system having self-monitoring function
FUJITSU LTD120 citations95
US6385213B1May 7, 2002
Frame synchronous pattern processing apparatus and frame synchronous pattern detection apparatus and method for detecting frame synchronous pattern
FUJITSU LTD25 citations92
US6118795ASep 12, 2000
Reception pointer processing apparatus in SDH transmission system
FUJITSU LTD36 citations92
US5754545AMay 19, 1998
Add-drop multiplexer with enhancement of accessibility to signals in different hierarchical levels and flexibility in various services and circuit setting operations
FUJITSU LTD24 citations92
US5311501AMay 10, 1994
Routing system for linear add-drop multiplexer
FUJITSU LTD23 citations92
US6009076ADec 28, 1999
Repeating installation
FUJITSU LTD21 citations91
US5909175AJun 1, 1999
Connection switching circuit for ring system
FUJITSU LTD23 citations91
US10644823B2May 5, 2020
Optical transfer system, control device, optical transfer method, and transfer device
FUJITSU LTD3 citations73
US5844889ADec 1, 1998
Different system transfer method for a ring transmission system and transmission apparatus
FUJITSU LTD14 citations73
US5172260ADec 15, 1992
Method for phase compensation of optical regenerator equipment
FUJITSU LTD14 citations73
US6919987B2Jul 19, 2005
Light wavelength-multiplexing systems
FUJITSU LTD11 citations72
US5134609AJul 28, 1992
Drop/insert channel selecting system
FUJITSU LTD11 citations71
US7151783B2Dec 19, 2006
Frame synchronous pattern processing apparatus and frame synchronous pattern detection apparatus and method for detecting frame synchronous pattern
FUJITSU LTD3 citations63
US7359316B1Apr 15, 2008
Reception pointer processing apparatus in SDH transmission system
FUJITSU LTD3 citations62
US6337848B1Jan 8, 2002
Path switching device for transmission apparatus
FUJITSU LTD5 citations62