Inventor · disambiguated record
Hisato Uetsuka
Also filed as: UETSUKA HISATO
29 granted patents·1 pending application·823 citations·filing 1984–2019
97Inventor score
Top patents by PatentIndex Score
30 records- 0196US5499308AGuided-wave optical multi/demultiplexerHITACHI CABLE·Filed 1995·Granted Mar 12, 1996·204 cites·10 claims
- 0291US5812709AOptical device having switching functionHITACHI CABLE·Filed 1996·Granted Sep 22, 1998·110 cites·9 claims
- 0390US6069990AOptical wavelength multiplexer/demultiplexerHITACHI CABLE·Filed 1998·Granted May 30, 2000·115 cites·5 claims
- 0487US6021239APhotocoupler and method for producing the sameSHARP KK·Filed 1997·Granted Feb 1, 2000·86 cites·11 claims
- 0585US6549696B1Optical wavelength multiplexer/demultiplexerHITACHI CABLE·Filed 2000·Granted Apr 15, 2003·40 cites·24 claims
- 0685US4753497ADirectional coupler for coupling single-polarization optical fibersHITACHI CABLE·Filed 1984·Granted Jun 28, 1988·48 cites·22 claims
- 0781US7567736B2Waveguide type wavelength domain optical switchNAT INST OF ADVANCED IND SCIEN·Filed 2008·Granted Jul 28, 2009·11 cites·20 claims
- 0879US6947631B2Waveguide-type optical multiplexer/demultiplexerHITACHI CABLE·Filed 2002·Granted Sep 20, 2005·19 cites·6 claims
- 0973US10989981B2Optical beam deflection element and moduleAIST·Filed 2017·Granted Apr 27, 2021·1 cites·16 claims
- 1073US8503836B2Wavelength domain optical switchISHIKAWA HIROSHI·Filed 2011·Granted Aug 6, 2013·4 cites·8 claims
- 1173US6556749B2Array waveguide grating and method of manufacture thereofHITACHI CABLE·Filed 2000·Granted Apr 29, 2003·17 cites·34 claims
- 1270US6031957AGlass wave guide element and method of manufacturing the sameHITACHI CABLE·Filed 1998·Granted Feb 29, 2000·36 cites·4 claims
- 1369US6724954B2Optical multiplexer/demultiplexerHITACHI CABLE INC·Filed 2001·Granted Apr 20, 2004·14 cites·6 claims
- 1468US8229258B2Optical waveguide-type wavelength domain switchISHIKAWA HIROSHI·Filed 2009·Granted Jul 24, 2012·5 cites·16 claims
- 1565US5995691AWaveguide type grating deviceHITACHI CABLE·Filed 1998·Granted Nov 30, 1999·29 cites·10 claims
- 1664US11327381B2Light beam switching element, assembly of same, and control method for sameAIST·Filed 2019·Granted May 10, 2022·0 cites·17 claims
- 1764US7496256B2Diffraction grating and dispersion compensation circuitUNIV KEIO·Filed 2007·Granted Feb 24, 2009·3 cites·5 claims
- 1862US5848207AOptical device formed with grating therein, add/drop filter using same, and method of fabricating sameHITACHI CABLE·Filed 1996·Granted Dec 8, 1998·21 cites·9 claims
- 1958US6631223B2Optical multiplexer/demultiplexerHITACHI CABLE·Filed 2001·Granted Oct 7, 2003·6 cites·14 claims
- 2057US5832154AOptical device formed with grating therein, add/drop filter using same, and method of fabricating sameHITACHI CABLE·Filed 1997·Granted Nov 3, 1998·17 cites·5 claims
- 2152US6668107B2Method and apparatus for reducing optical insertion loss in planar lightwave circuits through dielectric perturbation optimizationAGILENT TECHNOLOGIES INC·Filed 2001·Granted Dec 23, 2003·3 cites·20 claims
- 2249US11099446B2High-speed optical switching engineAIST·Filed 2018·Granted Aug 24, 2021·0 cites·14 claims
- 2346US6980707B2Waveguide type variable optical attenuatorHITACHI CABLE·Filed 2003·Granted Dec 27, 2005·3 cites·12 claims
- 2446US5903697AOptical waveguide, method of making the same and integrated optical deviceHITACHI LTD·Filed 1997·Granted May 11, 1999·12 cites·17 claims
- 2545US11635501B2Circular polarization-type polarization diversity element, scanning element using same, and lidarAIST·Filed 2018·Granted Apr 25, 2023·0 cites·19 claims
- 2642US2013272650A1Wavelength cross connect deviceOF ADVANCED IND SCIENCE AND TECHNOLOGY NAT INST·Filed 2013·Application pending·0 cites
- 2740US10613412B2Light beam deflecting element, wavelength-selective cross-connect device using same, and optical cross-connect deviceNATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE & TECH·Filed 2016·Granted Apr 7, 2020·0 cites·19 claims
- 2840US6093334AGlass wave guide element and method of manufacturing the sameHITACHI CABLE·Filed 1999·Granted Jul 25, 2000·8 cites·6 claims
- 2940US4953934AWaveguide type light merging and branching deviceHITACHI LTD·Filed 1988·Granted Sep 4, 1990·9 cites·2 claims
- 3030US6317534B1Optical wavelength routing deviceKOKUSAI DENSHIN DENWA CO LTD·Filed 1998·Granted Nov 13, 2001·2 cites·14 claims
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