Inventor · disambiguated record
Masatoshi Tokushima
Also filed as: TOKUSHIMA MASATOSHI
30 granted patents·1 pending application·401 citations·filing 1995–2020
97Inventor score
Top patents by PatentIndex Score
31 records- 0194US10088299B2Optical measurement element for alignment in wafer-level testing and method for aligning an optical probe using the sameNEC CORP·Filed 2017·Granted Oct 2, 2018·9 cites·8 claims
- 0293US9519115B2Optical circuitPHOTONICS ELECTRONICS TECHNOLOGY RES ASS·Filed 2014·Granted Dec 13, 2016·26 cites·17 claims
- 0393US8208776B2Optical control deviceTOKUSHIMA MASATOSHI·Filed 2008·Granted Jun 26, 2012·32 cites·3 claims
- 0493US6937781B2Optical switch having photonic crystal structureNEC CORP·Filed 2002·Granted Aug 30, 2005·72 cites·15 claims
- 0592US8170383B2Optical converterTOKUSHIMA MASATOSHI·Filed 2007·Granted May 1, 2012·32 cites·16 claims
- 0692US6366392B1Photonic crystalNEC CORP·Filed 2000·Granted Apr 2, 2002·48 cites·3 claims
- 0790US8873906B2Optical conversion element and optical conversion element manufacturing methodTOKUSHIMA MASATOSHI·Filed 2011·Granted Oct 28, 2014·13 cites·16 claims
- 0887US7158711B2Structure of photonic crystalNEC CORP·Filed 2005·Granted Jan 2, 2007·16 cites·47 claims
- 0987US7058244B2Microchip, method of manufacturing microchip, and method of detecting compositionsNEC CORP·Filed 2005·Granted Jun 6, 2006·11 cites·42 claims
- 1084US6558881B2Method of exposing a lattice pattern onto a photo-resist filmNEC CORP·Filed 2002·Granted May 6, 2003·23 cites·20 claims
- 1182US10025031B2Grating structure, and manufacturing method of grating coupler provided therewithPHOTONICS ELECTRONICS TECHNOLOGY RES ASS·Filed 2016·Granted Jul 17, 2018·4 cites·12 claims
- 1282US7263251B2Optical switch having photonic crystal structureNEC CORP·Filed 2005·Granted Aug 28, 2007·7 cites·7 claims
- 1381US6795621B2Waveguide comprising a connection of a photonic-crystal line-defect-waveguide to a total reflection confinement waveguideNEC CORP·Filed 2002·Granted Sep 21, 2004·22 cites·6 claims
- 1481US6466360B2Photonic crystal and its fabricationNEC CORP·Filed 2001·Granted Oct 15, 2002·19 cites·6 claims
- 1580US8027556B2Waveguide coupling structureNEC CORP·Filed 2006·Granted Sep 27, 2011·7 cites·21 claims
- 1679US8094978B2Polarization rotator and method for manufacturing the sameTOKUSHIMA MASATOSHI·Filed 2007·Granted Jan 10, 2012·9 cites·8 claims
- 1769US9971099B2Grating coupler with high optical coupling efficiency for SMFNEC CORP·Filed 2017·Granted May 15, 2018·1 cites·11 claims
- 1869US8705920B2Wavelength filterTOKUSHIMA MASATOSHI·Filed 2009·Granted Apr 22, 2014·4 cites·6 claims
- 1968US8554027B2Optical switchTOKUSHIMA MASATOSHI·Filed 2009·Granted Oct 8, 2013·2 cites·11 claims
- 2067US8478088B2Optical switch and manufacturing method thereofTOKUSHIMA MASATOSHI·Filed 2009·Granted Jul 2, 2013·2 cites·26 claims
- 2167US6621644B2Optical wavelength-demultiplexer with an improved optical lensNEC CORP·Filed 2002·Granted Sep 16, 2003·10 cites·29 claims
- 2263US6315819B1Apparatus for making exhaust gas non-toxicNEC CORP·Filed 2000·Granted Nov 13, 2001·8 cites·17 claims
- 2358US8600204B2Optical control deviceTOKUSHIMA MASATOSHI·Filed 2012·Granted Dec 3, 2013·0 cites·6 claims
- 2455US11137546B2Optical elementNEC CORP·Filed 2020·Granted Oct 5, 2021·0 cites·7 claims
- 2547US10535786B2Photodetector having one-dimensional grating structurePHOTONICS ELECTRONICS TECHNOLOGY RES ASS·Filed 2015·Granted Jan 14, 2020·0 cites·8 claims
- 2647US8355614B2Optical waveguideNEC CORP·Filed 2009·Granted Jan 15, 2013·0 cites·14 claims
- 2747US8355611B2Photonic crystal elementNEC CORP·Filed 2008·Granted Jan 15, 2013·0 cites·9 claims
- 2845US2011002581A1Optical switch and method of manufacturing the sameTOKUSHIMA MASATOSHI·Filed 2008·Application pending·0 cites
- 2944US6156666AMethod of dry etching and apparatus for making exhaust gas non-toxicNEC CORP·Filed 1997·Granted Dec 5, 2000·10 cites·43 claims
- 3043US6084258AMetal-semiconductor junction fetNEC CORP·Filed 1997·Granted Jul 4, 2000·8 cites·7 claims
- 3139US5618753AMethod for forming electrodes on mesa structures of a semiconductor substrateNEC CORP·Filed 1995·Granted Apr 8, 1997·6 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →