Inventor
CHIBA TAKAFUMI
JP8 patents
⚠️ This page may combine multiple inventors who share the name “CHIBA TAKAFUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI CABLE
5 patentsUS6556749B2Apr 29, 2003
Array waveguide grating and method of manufacture thereof
HITACHI CABLE17 citations82
US6947631B2Sep 20, 2005
Waveguide-type optical multiplexer/demultiplexer
HITACHI CABLE19 citations80
US6631223B2Oct 7, 2003
Optical multiplexer/demultiplexer
HITACHI CABLE6 citations62
US6980707B2Dec 27, 2005
Waveguide type variable optical attenuator
HITACHI CABLE3 citations60
US6643427B2Nov 4, 2003
Waveguide-arrayed optical wavelength multiplexer/demultiplexer and fabrication method of the same
HITACHI CABLE5 citations60