Inventor · disambiguated record
Ryuichi Naito
Also filed as: NAITO RYUICHI
25 granted patents·368 citations·filing 1982–1999
96Inventor score
Files withPIONEER ELECTRONIC CORP25
Top patents by PatentIndex Score
25 records- 0194US5463604AOptical disc with data recorded at different rates on different zones and recording apparatus, and reproducing apparatus thereforPIONEER ELECTRONIC CORP·Filed 1993·Granted Oct 31, 1995·73 cites·12 claims
- 0294US4611319ADisc drive control systemPIONEER ELECTRONIC CORP·Filed 1983·Granted Sep 9, 1986·42 cites·6 claims
- 0382US4540897ADigital modulation signal reading devicePIONEER ELECTRONIC CORP·Filed 1983·Granted Sep 10, 1985·25 cites·6 claims
- 0479US4535306APhase-locked loop detecting circuitPIONEER ELECTRONIC CORP·Filed 1983·Granted Aug 13, 1985·30 cites·8 claims
- 0577US4929917APhase-locked loop circuitPIONEER ELECTRONIC CORP·Filed 1988·Granted May 29, 1990·26 cites·5 claims
- 0670US5619484APulling-in circuit for PLL circuit, pulling-in method for PLL circuit, PLL circuit device and apparatus for reproducing optical discPIONEER ELECTRONIC CORP·Filed 1995·Granted Apr 8, 1997·21 cites·2 claims
- 0769US4544837AFocus servo control device for an optical system having an initial focus locking operationPIONEER ELECTRONIC CORP·Filed 1982·Granted Oct 1, 1985·15 cites·5 claims
- 0864US5034934AOpto-magnetic disk unit with improved dynamic range characteristics and opto-magnetic disk thereforPIONEER ELECTRONIC CORP·Filed 1989·Granted Jul 23, 1991·13 cites·6 claims
- 0961US5025431AAutochanger of writable discsPIONEER ELECTRONIC CORP·Filed 1988·Granted Jun 18, 1991·27 cites·7 claims
- 1057US5021894ARecorded data demodulation circuitPIONEER ELECTRONIC CORP·Filed 1990·Granted Jun 4, 1991·12 cites·2 claims
- 1155US5671201APulling-in circuit for PLL circuit, pulling-in method for PLL circuit, PLL circuit device and apparatus for reproducing optical discPIONEER ELECTRONIC CORP·Filed 1996·Granted Sep 23, 1997·10 cites·16 claims
- 1255US4679181AMethod for detecting an error in loading a recording discPIONEER ELECTRONIC CORP·Filed 1986·Granted Jul 7, 1987·8 cites·2 claims
- 1351US5646921AMethod and apparatus for reproducing information recorded on CLV disc type record mediumPIONEER ELECTRONIC CORP·Filed 1995·Granted Jul 8, 1997·10 cites·26 claims
- 1448US6262964B1Disc player with objective lens arranged in a zigzag patternPIONEER ELECTRONIC CORP·Filed 1999·Granted Jul 17, 2001·5 cites·9 claims
- 1547US5677904ADisc playerPIONEER ELECTRONIC CORP·Filed 1995·Granted Oct 14, 1997·5 cites·12 claims
- 1647US5025432AAutochanger of writable discs including a non-volatile memory for storing most recent defect management information relating to the writable discsPIONEER ELECTRONIC CORP·Filed 1988·Granted Jun 18, 1991·15 cites·8 claims
- 1745US4935618AWide bandwidth photoelectric converting circuitPIONEER ELECTRONIC CORP·Filed 1988·Granted Jun 19, 1990·10 cites·5 claims
- 1844US5848049ADisc player with parallel objective lensesPIONEER ELECTRONIC CORP·Filed 1997·Granted Dec 8, 1998·4 cites·4 claims
- 1943US4636745ASignal waveform equalizing circuitryPIONEER ELECTRONIC CORP·Filed 1984·Granted Jan 13, 1987·4 cites·4 claims
- 2042US4637005AFocus servo device of a system for reading out recorded informationPIONEER ELECTRONIC CORP·Filed 1983·Granted Jan 13, 1987·4 cites·3 claims
- 2137US5953308ADisc player with alternating ascending/descending guide devicesPIONEER ELECTRONIC CORP·Filed 1998·Granted Sep 14, 1999·2 cites·3 claims
- 2237US5023876AMethod and apparatus for detecting finally recorded sectorPIONEER ELECTRONIC CORP·Filed 1988·Granted Jun 11, 1991·3 cites·13 claims
- 2336US4486795ADisc drive servo systemPIONEER ELECTRONIC CORP·Filed 1982·Granted Dec 4, 1984·2 cites·14 claims
- 2434US5001698ARead-out information signal processing circuit in an optical recording and reproducing systemPIONEER ELECTRONIC CORP·Filed 1990·Granted Mar 19, 1991·2 cites·3 claims
- 2530US4493068APick-up point dislocation detecting device in recording a disc playerPIONEER ELECTRONIC CORP·Filed 1982·Granted Jan 8, 1985·0 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →