Assignee
PIONEER ELECTRIC CORP
JP·52 granted patents·1,550 citations·filing 1981–2003
Top patents by PatentIndex Score
52 records- 0196US5247126AImage reproducing apparatus, image information recording medium, and musical accompaniment playing apparatusPIONEER ELECTRIC CORP·Filed 1991·Granted Sep 21, 1993·136 cites·12 claims
- 0294US7295762B2Information record medium having first and second recording layers in which mid areas are recorded respectively, and apparatus for recording the samePIONEER ELECTRIC CORP·Filed 2003·Granted Nov 13, 2007·47 cites·21 claims
- 0393US6023124AElectron emission device and display device using the samePIONEER ELECTRIC CORP·Filed 1998·Granted Feb 8, 2000·81 cites·5 claims
- 0491US6088506AInformation record medium, apparatus for recording the same and apparatus for reproducing the samePIONEER ELECTRIC CORP·Filed 1997·Granted Jul 11, 2000·120 cites·14 claims
- 0590US6707774B1Recording and reproducing system, recording apparatus and reproducing apparatus having copy protection functionPIONEER ELECTRIC CORP·Filed 1999·Granted Mar 16, 2004·111 cites·9 claims
- 0688US6144625AOptical disc discriminating systemPIONEER ELECTRIC CORP·Filed 1998·Granted Nov 7, 2000·47 cites·8 claims
- 0786US6633723B1Recording and reproducing system, recording apparatus and reproducing apparatus having copy protection functionPIONEER ELECTRIC CORP·Filed 1999·Granted Oct 14, 2003·50 cites·27 claims
- 0885US6335713B1Drive apparatus which detects spatial charge voltage on charge storage light-emitting device and controls voltage and current based on the detection while drive current is blockedPIONEER ELECTRIC CORP·Filed 1999·Granted Jan 1, 2002·70 cites·26 claims
- 0985US4404676APartitioning method and apparatus using data-dependent boundary-marking code wordsPIONEER ELECTRIC CORP·Filed 1981·Granted Sep 13, 1983·37 cites·12 claims
- 1084US5218594ARecording medium with an optical waveguide and player for playing the samePIONEER ELECTRIC CORP·Filed 1991·Granted Jun 8, 1993·39 cites·19 claims
- 1183US5054886ALens framePIONEER ELECTRIC CORP·Filed 1990·Granted Oct 8, 1991·61 cites·7 claims
- 1280US5990988AReflection liquid crystal display and a semiconductor device for the displayPIONEER ELECTRIC CORP·Filed 1996·Granted Nov 23, 1999·85 cites·16 claims
- 1380US5742243AMethod and apparatus for reducing DC component of RLL codesPIONEER ELECTRIC CORP·Filed 1996·Granted Apr 21, 1998·48 cites·6 claims
- 1479US5739635AOrganic electroluminescent devicePIONEER ELECTRIC CORP·Filed 1996·Granted Apr 14, 1998·132 cites·6 claims
- 1579US5517476ADigital signal reproducing apparatus using a viterbi decoderPIONEER ELECTRIC CORP·Filed 1995·Granted May 14, 1996·28 cites·5 claims
- 1678US5982720ADisk reproducing apparatusPIONEER ELECTRIC CORP·Filed 1997·Granted Nov 9, 1999·32 cites·16 claims
- 1772US5218450AApparatus for reproducing information from a recording medium in accordance with a search commandPIONEER ELECTRIC CORP·Filed 1992·Granted Jun 8, 1993·22 cites·5 claims
- 1872US5123002ADisc player servo devicePIONEER ELECTRIC CORP·Filed 1989·Granted Jun 16, 1992·17 cites·11 claims
- 1963US4393513AInput signal level control device for receiverPIONEER ELECTRIC CORP·Filed 1981·Granted Jul 12, 1983·18 cites·8 claims
- 2062US5953585AMethod for manufacturing an organic electroluminescent display devicePIONEER ELECTRIC CORP·Filed 1997·Granted Sep 14, 1999·71 cites·6 claims
- 2162US5799046ADigital data signal reproducing apparatusPIONEER ELECTRIC CORP·Filed 1996·Granted Aug 25, 1998·16 cites·8 claims
- 2260US6088310APickup for an optical system including a blazed hologram for dividing a laserPIONEER ELECTRIC CORP·Filed 1997·Granted Jul 11, 2000·13 cites·3 claims
- 2359US5140704APulse noise suppressing system for fm receiverPIONEER ELECTRIC CORP·Filed 1989·Granted Aug 18, 1992·15 cites·10 claims
- 2458US4747116ASync signal detecting devicePIONEER ELECTRIC CORP·Filed 1986·Granted May 24, 1988·25 cites·6 claims
- 2557US5521750AProcess for forming proton exchange layer and wavelength converting elementPIONEER ELECTRIC CORP·Filed 1995·Granted May 28, 1996·24 cites·2 claims
- 2656US6823371B2Computer for a reproducing mediumPIONEER ELECTRIC CORP·Filed 2002·Granted Nov 23, 2004·1 cites·6 claims
- 2755US4486873ADisc loading mechanismPIONEER ELECTRIC CORP·Filed 1982·Granted Dec 4, 1984·8 cites·9 claims
- 2854US6552988B1Apparatus for reproducing information recorded on recording medium while adjusting middle level of detected signal corresponding to the informationPIONEER ELECTRIC CORP·Filed 1999·Granted Apr 22, 2003·11 cites·12 claims
- 2954US5093816AOptical magnetic recording and reproducing systemPIONEER ELECTRIC CORP·Filed 1990·Granted Mar 3, 1992·9 cites·3 claims
- 3054US4914537AMagnetic head device having a bridge corePIONEER ELECTRIC CORP·Filed 1988·Granted Apr 3, 1990·7 cites·2 claims
- 3151US5089900ASpindle control device in optical disk recording/reproducing apparatusPIONEER ELECTRIC CORP·Filed 1990·Granted Feb 18, 1992·8 cites·5 claims
- 3250US6185164B1Disk reproducing apparatusPIONEER ELECTRIC CORP·Filed 1997·Granted Feb 6, 2001·9 cites·17 claims
- 3350US5255162ALighting device for a grille of a car stereoPIONEER ELECTRIC CORP·Filed 1992·Granted Oct 19, 1993·15 cites·10 claims
- 3448US5987532ASingle-line, series connected, data transfer control systemPIONEER ELECTRIC CORP·Filed 1993·Granted Nov 16, 1999·23 cites·13 claims
- 3547US5488258ACircuit for muting noises in a power amplifierPIONEER ELECTRIC CORP·Filed 1994·Granted Jan 30, 1996·19 cites·7 claims
- 3647US4885733AMethod of, and system for, detecting an excessive loading condition of multiple disks in a video disk apparatusPIONEER ELECTRIC CORP·Filed 1988·Granted Dec 5, 1989·8 cites·10 claims
- 3747US4539669AFront-loading record playerPIONEER ELECTRIC CORP·Filed 1983·Granted Sep 3, 1985·6 cites·10 claims
- 3845US5138246ABattery protecting system in a car stereoPIONEER ELECTRIC CORP·Filed 1991·Granted Aug 11, 1992·14 cites·5 claims
- 3945US4999710ATelevision signal receiving apparatusPIONEER ELECTRIC CORP·Filed 1988·Granted Mar 12, 1991·10 cites·14 claims
- 4044US5825789AProcess for producing a resonator in a semiconductor laser devicePIONEER ELECTRIC CORP·Filed 1995·Granted Oct 20, 1998·10 cites·6 claims
- 4144US5475440ADigital time base corrector for video signal reproductionPIONEER ELECTRIC CORP·Filed 1993·Granted Dec 12, 1995·11 cites·2 claims
- 4243US4847827AOptical information recording diskPIONEER ELECTRIC CORP·Filed 1988·Granted Jul 11, 1989·10 cites·18 claims
- 4340US6356523B1Apparatus for reproducing information recorded on optical discPIONEER ELECTRIC CORP·Filed 1998·Granted Mar 12, 2002·5 cites·5 claims
- 4435US6385163B1Optical recording mediumPIONEER ELECTRIC CORP·Filed 1999·Granted May 7, 2002·2 cites·12 claims
- 4535US5140433ANoise reduction circuit for reducing video signal noise by mixing current and previous video signalPIONEER ELECTRIC CORP·Filed 1990·Granted Aug 18, 1992·4 cites·2 claims
- 4633US5231396AR-2R digital-to-analog converter having transistors of equal emitter sizePIONEER ELECTRIC CORP·Filed 1992·Granted Jul 27, 1993·5 cites·3 claims
- 4731US5149374ADevice for forming LB filmPIONEER ELECTRIC CORP·Filed 1990·Granted Sep 22, 1992·2 cites·5 claims
- 4830US4914646AOptical pickup device having particularly shaped photodetectors for providing an accurate focus errorPIONEER ELECTRIC CORP·Filed 1988·Granted Apr 3, 1990·0 cites·10 claims
- 4930US4633342ARotary head type magnetic recording and reproducing devicePIONEER ELECTRIC CORP·Filed 1985·Granted Dec 30, 1986·0 cites·9 claims
- 5028US6529718B1Receiver with a search circuitPIONEER ELECTRIC CORP·Filed 1999·Granted Mar 4, 2003·4 cites·7 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
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