Inventor · disambiguated record
Toshio Katsuyama
Also filed as: KATSUYAMA TOSHIO · SUGIE MAMORU
41 granted patents·8 pending applications·981 citations·filing 1978–2022
98Inventor score
Files withHITACHI LTD27UNIV FUKUI10NATIONAL UNIV CORPORATION UNIV OF FUKUI7SEIREN KST CORP2HITACHI CABLE1
Top patents by PatentIndex Score
49 records- 0197US5332910ASemiconductor optical device with nanowhiskersHITACHI LTD·Filed 1993·Granted Jul 26, 1994·222 cites·24 claims
- 0295US11287571B2MultiplexerNATIONAL UNIV CORPORATION UNIV OF FUKUI·Filed 2020·Granted Mar 29, 2022·4 cites·1 claims
- 0395US10408999B2MultiplexerNATIONAL UNIV CORPORATION UNIV OF FUKUI·Filed 2018·Granted Sep 10, 2019·10 cites·4 claims
- 0495US4426129AOptical fiber and method of producing the sameHITACHI LTD·Filed 1981·Granted Jan 17, 1984·51 cites·12 claims
- 0592US5362972ASemiconductor device using whiskersHITACHI LTD·Filed 1991·Granted Nov 8, 1994·192 cites·48 claims
- 0689US12174381B2Image display device using retinal scanning display unit and image display systemUNIV FUKUI·Filed 2020·Granted Dec 24, 2024·2 cites·11 claims
- 0789US4323381AMethod for producing mother rods for optical fibersHITACHI LTD·Filed 1980·Granted Apr 6, 1982·36 cites·56 claims
- 0888US9952389B2Multiplexer, image projection apparatus using the multiplexer and image projection systemNATIONAL UNIV CORPORATION UNIV OF FUKUI·Filed 2015·Granted Apr 24, 2018·6 cites·15 claims
- 0984US4604577ATemperature-compensated magnetic field measuring instrumentHITACHI LTD·Filed 1983·Granted Aug 5, 1986·39 cites·23 claims
- 1082US11307405B2Image generating device and image generating method for detecting position of pupilUNIV FUKUI·Filed 2019·Granted Apr 19, 2022·3 cites·18 claims
- 1182US4840446APhoto semiconductor device having a multi-quantum well structureHITACHI CABLE·Filed 1987·Granted Jun 20, 1989·49 cites·10 claims
- 1281US6731846B2Dispersion compensator and optical transmission system using sameHITACHI LTD·Filed 2001·Granted May 4, 2004·27 cites·8 claims
- 1379US4813757AOptical switch including bypass waveguideHITACHI LTD·Filed 1987·Granted Mar 21, 1989·42 cites·3 claims
- 1478US10185091B2Multiplexer, image projection apparatus using the multiplexer and image projection systemNATIONAL UNIV CORPORATION UNIV OF FUKUI·Filed 2018·Granted Jan 22, 2019·2 cites·1 claims
- 1578US4957337AOptical quantum interference device and method of modulating light using sameHITACHI LTD·Filed 1989·Granted Sep 18, 1990·30 cites·31 claims
- 1676US11067792B2Two-dimensional optical scanning mirror device, manufacturing method for same, two-dimensional optical scanner and image projectorNATIONAL UNIV CORPORATION UNIV OF FUKUI·Filed 2018·Granted Jul 20, 2021·2 cites·9 claims
- 1775US4612294AGlass material for optical fibers used in infrared regionHITACHI LTD·Filed 1984·Granted Sep 16, 1986·28 cites·11 claims
- 1874US5091980AOptical quantum interference device/optical computer and method of modulating light using sameHITACHI LTD·Filed 1990·Granted Feb 25, 1992·29 cites·14 claims
- 1974US4505729AMethod of producing optical fiber preformHITACHI LTD·Filed 1983·Granted Mar 19, 1985·19 cites·21 claims
- 2071US4730896AMember for infrared ray transmissionHITACHI LTD·Filed 1985·Granted Mar 15, 1988·25 cites·4 claims
- 2171US4406518ASingle-mode-transmission optical fiber and a method of manufacturing the sameHITACHI LTD·Filed 1981·Granted Sep 27, 1983·18 cites·5 claims
- 2270US2021286127A1MultiplexerNATIONAL UNIV CORPORATION UNIV OF FUKUI·Filed 2021·Application pending·0 cites
- 2367US7450789B2Micro sensor deviceHITACHI LTD·Filed 2006·Granted Nov 11, 2008·2 cites·6 claims
- 2466US4861130AOptical modulating device utilizing polariton substanceHITACHI LTD·Filed 1987·Granted Aug 29, 1989·23 cites·22 claims
- 2566US4203743AMethod of producing optical fiberHITACHI LTD·Filed 1978·Granted May 20, 1980·20 cites·20 claims
- 2663US2019339451A1MultiplexerNATIONAL UNIV CORPORATION UNIV OF FUKUII·Filed 2019·Application pending·0 cites
- 2761US4206968AOptical fiber and method for producing the sameHITACHI LTD·Filed 1978·Granted Jun 10, 1980·16 cites·12 claims
- 2860US6931189B2Optical waveguides and optical devices with optical waveguidesHITACHI LTD·Filed 2002·Granted Aug 16, 2005·7 cites·6 claims
- 2960US4887877AOptical devices and optical integrated circuitsHITACHI LTD·Filed 1988·Granted Dec 19, 1989·19 cites·29 claims
- 3059US7145146B2Micro-spectroscopic measuring device and micro-chemical systemHITACHI LTD·Filed 2004·Granted Dec 5, 2006·2 cites·16 claims
- 3157US12306435B2Optical multiplexer and manufacturing method for the sameUNIV FUKUI·Filed 2022·Granted May 20, 2025·0 cites·12 claims
- 3257US4900134AOptical deviceHITACHI LTD·Filed 1987·Granted Feb 13, 1990·16 cites·28 claims
- 3357US4887273AIntercalation compound and generator of coherent radiation using the sameHITACHI LTD·Filed 1986·Granted Dec 12, 1989·13 cites·17 claims
- 3456US11307407B2Two-dimensional optical scanning mirror device, manufacturing method for same, two-dimensional optical scanner and image projectorNATIONAL UNIV CORPORATION UNIV OF FUKUI·Filed 2020·Granted Apr 19, 2022·0 cites·10 claims
- 3554US11895442B2Light beam emission device and light beam projection device equipped therewithUNIV FUKUI·Filed 2021·Granted Feb 6, 2024·0 cites·18 claims
- 3650US12105326B2Optical multiplexer reduced in background lightSEIREN KST CORP·Filed 2021·Granted Oct 1, 2024·0 cites·5 claims
- 3750US2021400244A1Optical scanning type video projection deviceUNIV FUKUI·Filed 2021·Application pending·0 cites
- 3849US12050342B2Optical multiplexer and optical multiplexing methodUNIV FUKUI·Filed 2021·Granted Jul 30, 2024·0 cites·9 claims
- 3949US4828592APolarization plane maintaining optical fiber fabricating methodHITACHI LTD·Filed 1986·Granted May 9, 1989·9 cites·8 claims
- 4048US2021152794A1Optical multiplexer, light source module, two-dimensional optical scanning device, and image projection deviceUNIV FUKUI·Filed 2021·Application pending·0 cites
- 4147US2021149110A1Optical waveguide-type optical multiplexer, optical waveguide-type multiplexing light source optical device and image projecting deviceUNIV FUKUI·Filed 2021·Application pending·0 cites
- 4247US2021149111A1Optical multiplexer, light source module, two-dimensional optical scanning device, and image projection deviceUNIV FUKUI·Filed 2021·Application pending·0 cites
- 4345US11188149B2Image display device using retinal scanning display unit and method thereofUNIV FUKUI·Filed 2019·Granted Nov 30, 2021·0 cites·11 claims
- 4441US2025004221A1Optical waveguide device and light source moduleSEIREN KST CORP·Filed 2022·Application pending·0 cites
- 4540US4570064AOptical D.C. electric-field measuring apparatus with optic sensing means exhibiting both electrooptic and photoelectric effectsHITACHI LTD·Filed 1983·Granted Feb 11, 1986·6 cites·16 claims
- 4638US4838633ASemiconductor device with high speed signal transmission arrangement utilizing lightHITACHI LTD·Filed 1986·Granted Jun 13, 1989·5 cites·24 claims
- 4738US4483617AOptical gyroscope with large propagation constant differenceHITACHI LTD·Filed 1982·Granted Nov 20, 1984·4 cites·4 claims
- 4837US2003185532A1Optical functional device and fabrication process for the sameFiled 2002·Application pending·0 cites
- 4933US5698798AMethod and apparatus for dynamic observation of specimenHITACHI LTD·Filed 1995·Granted Dec 16, 1997·3 cites·8 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →