Inventor
TAKAKI KEISHI
JP21 patents
⚠️ This page may combine multiple inventors who share the name “TAKAKI KEISHI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
FURUKAWA ELECTRIC CO LTD
12 patentsUS7180930B2Feb 20, 2007
DFB semiconductor laser device having ununiform arrangement of a diffraction grating
FURUKAWA ELECTRIC CO LTD18 citations82
US9653589B2May 16, 2017
Semiconductor multi-layer substrate, semiconductor device, and method for manufacturing the same
FURUKAWA ELECTRIC CO LTD8 citations81
US9911842B2Mar 6, 2018
Nitride semiconductor device, production method thereof, diode, and field effect transistor
FURUKAWA ELECTRIC CO LTD8 citations80
US7888145B2Feb 15, 2011
Method of manufacturing vertical-cavity surface-emitting laser device and vertical-cavity surface-emitting laser device
FURUKAWA ELECTRIC CO LTD2 citations62
US7907653B2Mar 15, 2011
Vertical cavity surface emitting laser device and vertical cavity surface emitting laser array
FURUKAWA ELECTRIC CO LTD6 citations61
US7418020B2Aug 26, 2008
Surface emitting laser device
FURUKAWA ELECTRIC CO LTD4 citations61
US7881353B2Feb 1, 2011
Surface emitting laser element array
FURUKAWA ELECTRIC CO LTD4 citations59
US8532155B2Sep 10, 2013
Optical interconnection system
FURUKAWA ELECTRIC CO LTD1 citations51
US11139632B2Oct 5, 2021
Optical module and light output device
FURUKAWA ELECTRIC CO LTD0 citations50
US7801198B2Sep 21, 2010
Surface emitting laser element and method of fabricating the same
FURUKAWA ELECTRIC CO LTD1 citations48
US7593448B2Sep 22, 2009
Semiconductor laser module and optical transmission apparatus using the semiconductor laser module
FURUKAWA ELECTRIC CO LTD0 citations41
US8941149B2Jan 27, 2015
Semiconductor device
FURUKAWA ELECTRIC CO LTD0 citations40