Inventor
KANETAKE TATSUO
JP14 patents
⚠️ This page may combine multiple inventors who share the name “KANETAKE TATSUO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
13 patentsUS5235449AAug 10, 1993
Polarizer with patterned diacetylene layer, method for producing the same, and liquid crystal display device including such polarizer
HITACHI LTD71 citations96
US7212526B2May 1, 2007
Method and apparatus for composing virtual links in a label switched network
HITACHI LTD30 citations92
US6643041B1Nov 4, 2003
Optical network
HITACHI LTD35 citations92
US6362905B1Mar 26, 2002
Optical crossconnect apparatus and optical transmission system
HITACHI LTD36 citations92
US5710847AJan 20, 1998
Semiconductor optical functional device
HITACHI LTD23 citations92
US7522592B2Apr 21, 2009
Packet transfer unit
HITACHI LTD11 citations84
US6304346B1Oct 16, 2001
Fault restoration control method and it's apparatus in a communication network
HITACHI LTD18 citations84
US6813445B2Nov 2, 2004
Optical crossconnect apparatus and optical transmission system
HITACHI LTD6 citations73
US6317230B1Nov 13, 2001
Optical cross-connect system and optical transmission system
HITACHI LTD14 citations73
US5351320ASep 27, 1994
Optical modulator depressing optical feedback and optical modulating element and channel optical waveguide used therefore
HITACHI LTD8 citations73
US7379456B2May 27, 2008
Network routing apparatus
HITACHI LTD4 citations62
US7924833B2Apr 12, 2011
Packet transfer unit
HITACHI LTD1 citations52
US7272314B2Sep 18, 2007
Optical crossconnect apparatus and optical transmission system
HITACHI LTD0 citations52