Inventor · disambiguated record
Katsuyuki Imoto
Also filed as: IMOTO KATSUYUKI
34 granted patents·2 pending applications·1,268 citations·filing 1974–2020
98Inventor score
Top patents by PatentIndex Score
36 records- 0199US5916460AMethod and apparatus for dicing a substrateHITACHI CABLE·Filed 1996·Granted Jun 29, 1999·167 cites·22 claims
- 0294US5206925ARare earth element-doped optical waveguide and process for producing the sameHITACHI CABLE·Filed 1991·Granted Apr 27, 1993·149 cites·12 claims
- 0389US5742722ARare earth element-doped multiple-core optical fiber and optical systems using the samefield of the inventionHITACHI CABLE·Filed 1997·Granted Apr 21, 1998·71 cites·6 claims
- 0487US5497445APolymer core optical wave-guide and fabrication method thereofHITACHI CABLE INC·Filed 1994·Granted Mar 5, 1996·79 cites·16 claims
- 0587US4856859AOptical waveguide and method for fabricating the sameHITACHI LTD·Filed 1988·Granted Aug 15, 1989·57 cites·17 claims
- 0687US3973828AOptical wave guideHITACHI LTD·Filed 1974·Granted Aug 10, 1976·48 cites·5 claims
- 0785US4123242AApparatus for producing optical fiberHITACHI LTD·Filed 1977·Granted Oct 31, 1978·32 cites·6 claims
- 0882US5703987ARare earth element-doped multiple-core optical fiber and optical systems using the same field of the inventionHITACHI CABLE·Filed 1996·Granted Dec 30, 1997·26 cites·13 claims
- 0981US4880289ATwo-way optical transmission systemHITACHI LTD·Filed 1984·Granted Nov 14, 1989·50 cites·20 claims
- 1080US5111323AOptical switching systemHITACHI LTD·Filed 1989·Granted May 5, 1992·50 cites·9 claims
- 1180US4101300AMethod and apparatus for drawing optical fiberHITACHI LTD·Filed 1976·Granted Jul 18, 1978·24 cites·30 claims
- 1279US4822128AOptical fiber star coupler and method of manufacturing the sameHITACHI LTD·Filed 1986·Granted Apr 18, 1989·32 cites·11 claims
- 1378US4726643AOptical star coupler and method for manufacturing the sameHITACHI LTD·Filed 1985·Granted Feb 23, 1988·34 cites·18 claims
- 1478US4601535AOptical coupling system with intermediate coupling mediumHITACHI LTD·Filed 1985·Granted Jul 22, 1986·38 cites·4 claims
- 1577US4801190ATwo-way optical fiber transmission networkHITACHI LTD·Filed 1987·Granted Jan 31, 1989·44 cites·10 claims
- 1677US4790614AOptical filter and optical device using sameHITACHI LTD·Filed 1986·Granted Dec 13, 1988·35 cites·17 claims
- 1775US5712941ARare earth element-doped multiple-core optical fiber and method for fabricating the sameHITACHI CABLE·Filed 1996·Granted Jan 27, 1998·42 cites·15 claims
- 1874US9703035B2Optical connector, method for manufacturing the same, and mold container for manufacturing the sameKOHOKU KOGYO KK·Filed 2014·Granted Jul 11, 2017·3 cites·6 claims
- 1974US5570448ARare earth element-doped multiple-core optical fiber, method for fabricating the same, and optical amplifier using the sameHITACHI CABLE·Filed 1995·Granted Oct 29, 1996·23 cites·16 claims
- 2074US4904037AWaveguide type optical device with thermal compensation layersHITACHI LTD·Filed 1988·Granted Feb 27, 1990·32 cites·5 claims
- 2172US4756587AOptical multi/demultiplexerHITACHI LTD·Filed 1987·Granted Jul 12, 1988·29 cites·6 claims
- 2271US4909584AOptical multi/demultiplexer and optical module using the sameHITACHI LTD·Filed 1987·Granted Mar 20, 1990·34 cites·14 claims
- 2369US5140453AOptical receiving method utilizing polarization diversity and apparatus for carrying out the sameHITACHI LTD·Filed 1988·Granted Aug 18, 1992·32 cites·13 claims
- 2468US4259101AMethod for producing optical fiber preformHITACHI LTD·Filed 1979·Granted Mar 31, 1981·15 cites·10 claims
- 2567US7035518B2Polymer waveguides and process for producing the sameHITACHI CABLE·Filed 2002·Granted Apr 25, 2006·10 cites·12 claims
- 2666US2020199008A1Method for Manufacturing Optical Fiber Base Material and Optical Fiber Base MaterialKOHOKU KYOGO CO LTD·Filed 2020·Application pending·0 cites
- 2760US4871221AOptical waveguide deviceHITACHI LTD·Filed 1988·Granted Oct 3, 1989·18 cites·6 claims
- 2857US5706124ARare earth element-doped optical fiber amplifierHITACHI CABLE·Filed 1996·Granted Jan 6, 1998·20 cites·6 claims
- 2956US4842359AOptical star coupler and method of manufacturing the sameHITACHI LTD·Filed 1987·Granted Jun 27, 1989·15 cites·10 claims
- 3055US4970713AWaveguide type optical multiplexer/demultiplexer with a wave guide regulating functionHITACHI LTD·Filed 1988·Granted Nov 13, 1990·15 cites·5 claims
- 3150US5134672AOptical waveguide type star couplerHITACHI CABLE·Filed 1990·Granted Jul 28, 1992·13 cites·4 claims
- 3248US2015086784A1Method for manufacturing optical fiber base material and optical fiber base materialKOHOKU KOGYO KK·Filed 2013·Application pending·0 cites
- 3345US5475777AOptical device with a pig tail optical fiber and its production methodHITACHI CABLE·Filed 1994·Granted Dec 12, 1995·11 cites·12 claims
- 3444US5190364AOptical star coupler and method for manufacturing the sameHITACHI CABLE·Filed 1987·Granted Mar 2, 1993·11 cites·15 claims
- 3542US6830818B2Polymer material and polymer filmHITACHI CABLE·Filed 2002·Granted Dec 14, 2004·0 cites·20 claims
- 3640US4953934AWaveguide type light merging and branching deviceHITACHI LTD·Filed 1988·Granted Sep 4, 1990·9 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →