Inventor · disambiguated record
Kiyofumi Chikuma
Also filed as: CHIKUMA KIYOFUMI
65 granted patents·3 pending applications·1,407 citations·filing 1986–2005
99Inventor score
Top patents by PatentIndex Score
68 records- 0197US6270839B1Device for feeding raw material for chemical vapor phase deposition and method thereforPIONEER CORP·Filed 2000·Granted Aug 7, 2001·189 cites·9 claims
- 0296US6711192B1Nitride semiconductor laser and method of fabricating the samePIONEER CORP·Filed 2000·Granted Mar 23, 2004·107 cites·8 claims
- 0395US5283777AThree-dimensional optical recording medium and optical information recording apparatus using the samePIONEER ELECTRONIC CORP·Filed 1991·Granted Feb 1, 1994·99 cites·13 claims
- 0493US5904771AMethod of subliming material in CVD film preparation methodDOWA MINING CO·Filed 1997·Granted May 18, 1999·106 cites·8 claims
- 0589US5182669AHigh density optical disk and method of makingPIONEER ELECTRONIC CORP·Filed 1992·Granted Jan 26, 1993·80 cites·6 claims
- 0688US6748001B1Semiconductor laser device providing laser light of two wavelengths and method of fabricating the samePIONEER CORP·Filed 2000·Granted Jun 8, 2004·29 cites·9 claims
- 0787US5303224AOptical pickup, optical information recording carrier and recording and reproducing apparatus thereofPIONEER ELECTRONIC CORP·Filed 1992·Granted Apr 12, 1994·41 cites·6 claims
- 0884US5063556AOptical information recording medium providing reflected light at two different wavelengths, recording apparatus utilizing the samePIONEER ELECTRONIC CORP·Filed 1990·Granted Nov 5, 1991·30 cites·5 claims
- 0983US6510597B2Surface acoustic wave device and method of manufacturing the samePIONEER CORP·Filed 2002·Granted Jan 28, 2003·21 cites·5 claims
- 1083US5285274AOptical waveguide recording medium and apparatus for playing the samePIONEER ELECTRONIC CORP·Filed 1991·Granted Feb 8, 1994·35 cites·14 claims
- 1182US5982804ANon-regrowth distributed feedback ridge semiconductor laser and method of manufacturing the samePIONEER ELECTRONIC CORP·Filed 1997·Granted Nov 9, 1999·52 cites·9 claims
- 1282US4927681AOptical information recording medium providing reflected light at two different wavelengthsPIONEER ELECTRONIC CORP·Filed 1989·Granted May 22, 1990·22 cites·13 claims
- 1378US6411636B1Nitride semiconductor laser and method of fabricating the samePIONEER CORP·Filed 1999·Granted Jun 25, 2002·43 cites·15 claims
- 1477US6381258B1Ridge-structure DFB semiconductor laser and method of manufacturing the samePIONEER CORP·Filed 2000·Granted Apr 30, 2002·12 cites·8 claims
- 1576US5072437AOptical information reproducing apparatusPIONEER ELECTRONIC CORP·Filed 1990·Granted Dec 10, 1991·24 cites·7 claims
- 1675US5172369AOptical pickup, optical information recording carrier and recording and reproducing apparatus thereofPIONEER ELECTRONIC CORP·Filed 1991·Granted Dec 15, 1992·23 cites·6 claims
- 1774US5581396AWavelength converting device having an epitaxial waveguide layerPIONEER ELECTRONIC CORP·Filed 1995·Granted Dec 3, 1996·48 cites·5 claims
- 1872US5233582AOptical waveguide recording medium playing apparatusPIONEER ELECTRONIC CORP·Filed 1991·Granted Aug 3, 1993·22 cites·13 claims
- 1971US6573116B2Ridge type semiconductor laser of laterally-coupled distributed feedback and method of manufacturing the samePIONEER ELECTRONIC CORP·Filed 2001·Granted Jun 3, 2003·9 cites·11 claims
- 2067US6795466B1Distributed feedback type semiconductor laser devicePIONEER CORP·Filed 2000·Granted Sep 21, 2004·8 cites·3 claims
- 2166US7333525B2Integrated semiconductor light-emitting device and method for manufacturing samePIONEER CORP·Filed 2005·Granted Feb 19, 2008·2 cites·7 claims
- 2266US6301283B1Distributed feedback semiconductor laserPIONEER ELECTRONIC CORP·Filed 1999·Granted Oct 9, 2001·28 cites·20 claims
- 2365US6537841B2Ridge-structure DFB semiconductor laser and method of manufacturing the samePIONEER CORP·Filed 2002·Granted Mar 25, 2003·6 cites·9 claims
- 2464US5172366AOptical information reproducing apparatus with selective photodetector outputPIONEER ELECTRONIC CORP·Filed 1990·Granted Dec 15, 1992·14 cites·7 claims
- 2563US7399649B2Semiconductor light-emitting device and fabrication method thereofPIONEER CORP·Filed 2004·Granted Jul 15, 2008·8 cites·11 claims
- 2663US4892375AFiber-type light conversion devicePIONEER ELECTRONIC CORP·Filed 1989·Granted Jan 9, 1990·22 cites·1 claims
- 2762US5722184AMethod for feeding metalorganic gas from solid raw materials in MOCVD and its devicePIONEER ELECTRONIC CORP·Filed 1996·Granted Mar 3, 1998·23 cites·13 claims
- 2861US6504632B1Optical transmitter and receiver module which demultiplexes a superimposed optical signalPIONEER CORP·Filed 1999·Granted Jan 7, 2003·24 cites·3 claims
- 2961US6292503B1Ridge type semiconductor laser of laterally-coupled distributed feedback and method of manufacturing the samePIONEER ELECTRONIC CORP·Filed 1999·Granted Sep 18, 2001·20 cites·4 claims
- 3056US6348754B1Surface acoustic wave device and method of manufacturing the samePIONEER CORP·Filed 2000·Granted Feb 19, 2002·5 cites·7 claims
- 3156US6291256B1Method of manufacturing non-regrowth distributed feedback ridge semiconductorPIONEER CORP·Filed 1999·Granted Sep 18, 2001·18 cites·12 claims
- 3256US5214633AOptical waveguide recording medium playing apparatusPIONEER ELECTRONIC CORP·Filed 1991·Granted May 25, 1993·11 cites·9 claims
- 3354US5285508AOptical wavelength converterPIONEER ELECTRONIC CORP·Filed 1993·Granted Feb 8, 1994·17 cites·7 claims
- 3453US6714571B2Ridge type semiconductor laser of distributed feedbackPIONEER CORP·Filed 2001·Granted Mar 30, 2004·3 cites·11 claims
- 3553US4962993AFibre-type light conversion devicePIONEER ELECTRONIC CORP·Filed 1989·Granted Oct 16, 1990·14 cites·6 claims
- 3652US5052772AFiber type light wave-length converting apparatusPIONEER ELECTRONIC CORP·Filed 1990·Granted Oct 1, 1991·16 cites·1 claims
- 3752US4909587AFibre-type light conversion devicePIONEER ELECTRONIC CORP·Filed 1989·Granted Mar 20, 1990·14 cites·1 claims
- 3851US7315506B2Information recording medium, information recording apparatus, information recording method, information playback apparatus, information playback method, recording program recording medium, and playback program recording mediumPIONEER CORP·Filed 2004·Granted Jan 1, 2008·1 cites·11 claims
- 3951US5119458AFibre-type wavelength converison devicePIONEER ELECTRONIC CORP·Filed 1989·Granted Jun 2, 1992·8 cites·5 claims
- 4050US6149975APotassium-containing thin film and process for producing the sameDOWA MINING CO·Filed 1999·Granted Nov 21, 2000·14 cites·2 claims
- 4148US7477669B2Semiconductor laser device and method of manufacturing the samePIONEER CORP·Filed 2004·Granted Jan 13, 2009·1 cites·14 claims
- 4248US4671623AAspheric object lens for optical data read-out apparatusPIONEER ELECTRONIC CORP·Filed 1986·Granted Jun 9, 1987·12 cites·1 claims
- 4346US6515311B1Gallium nitride based semiconductor light emitting devicePIONEER CORP·Filed 2000·Granted Feb 4, 2003·1 cites·6 claims
- 4445US6535670B1Optical transmitter/receiver module and method of manufacturing the samePIONEER CORP·Filed 1999·Granted Mar 18, 2003·11 cites·19 claims
- 4545US5165004AWavelength conversion elementPIONEER ELECTRONIC CORP·Filed 1991·Granted Nov 17, 1992·11 cites·9 claims
- 4644US6500687B2Distributed feedback semiconductor laser element and method for making the samePIONEER ELECTRONIC CORP·Filed 1998·Granted Dec 31, 2002·10 cites·9 claims
- 4744US5189722AFiber type wavelength conversion elementPIONEER ELECTRONIC CORP·Filed 1992·Granted Feb 23, 1993·10 cites·10 claims
- 4844US2005122886A1Recording/reproducing head, method of producing the same, and recording apparatus and reproducing apparatusPIONEER CORP·Filed 2004·Application pending·0 cites
- 4943US5061038AFiber type wavelength converterPIONEER ELECTRONIC CORP·Filed 1991·Granted Oct 29, 1991·10 cites·2 claims
- 5043US4981337AFibre-type light wavelength coversion devicePIONEER ELECTRONIC CORP·Filed 1989·Granted Jan 1, 1991·9 cites·4 claims
Showing the top 50 of 68 patent records by PatentIndex Score.
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