Inventor · disambiguated record
Akio Tokumo
Also filed as: TOKUMO AKIO
21 granted patents·764 citations·filing 1979–1993
96Inventor score
Files withPIONEER ELECTRONIC CORP21
Top patents by PatentIndex Score
21 records- 0196US4949048APulse width modulation amplifier circuitPIONEER ELECTRONIC CORP·Filed 1989·Granted Aug 14, 1990·77 cites·5 claims
- 0295US4476571AAutomatic sound volume control devicePIONEER ELECTRONIC CORP·Filed 1982·Granted Oct 9, 1984·64 cites·14 claims
- 0391US4980914ASound field correction systemPIONEER ELECTRONIC CORP·Filed 1989·Granted Dec 25, 1990·68 cites·9 claims
- 0491US4739513AMethod and apparatus for measuring and correcting acoustic characteristic in sound fieldPIONEER ELECTRONIC CORP·Filed 1985·Granted Apr 19, 1988·83 cites·3 claims
- 0590US4992749APulse-width modulating amplifier circuitPIONEER ELECTRONIC CORP·Filed 1989·Granted Feb 12, 1991·39 cites·3 claims
- 0690US4968948APulse width modulation amplifier circuitPIONEER ELECTRONIC CORP·Filed 1989·Granted Nov 6, 1990·40 cites·3 claims
- 0790US4415863APulse width modulation amplifierPIONEER ELECTRONIC CORP·Filed 1981·Granted Nov 15, 1983·35 cites·7 claims
- 0887US4622691AMobile sound field correcting devicePIONEER ELECTRONIC CORP·Filed 1985·Granted Nov 11, 1986·57 cites·11 claims
- 0986US4696370AHeadrest-mounted acoustic devicePIONEER ELECTRONIC CORP·Filed 1985·Granted Sep 29, 1987·59 cites·10 claims
- 1085US4952884APulse width modulation amplifier circuitPIONEER ELECTRONIC CORP·Filed 1989·Granted Aug 28, 1990·30 cites·3 claims
- 1184US4694498AAutomatic sound field correcting systemPIONEER ELECTRONIC CORP·Filed 1985·Granted Sep 15, 1987·40 cites·5 claims
- 1284US4648117AMobile sound field correcting devicePIONEER ELECTRONIC CORP·Filed 1985·Granted Mar 3, 1987·47 cites·13 claims
- 1383US4456887ADifferential amplifierPIONEER ELECTRONIC CORP·Filed 1981·Granted Jun 26, 1984·24 cites·11 claims
- 1479US5343161APower amplifier apparatusPIONEER ELECTRONIC CORP·Filed 1993·Granted Aug 30, 1994·29 cites·1 claims
- 1569US4644292AAutomatic gain and frequency characteristic control unit in audio devicePIONEER ELECTRONIC CORP·Filed 1985·Granted Feb 17, 1987·19 cites·11 claims
- 1659US4868878ASound field correction systemPIONEER ELECTRONIC CORP·Filed 1987·Granted Sep 19, 1989·28 cites·2 claims
- 1750US4928071ALimiter circuitPIONEER ELECTRONIC CORP·Filed 1988·Granted May 22, 1990·8 cites·7 claims
- 1847US4496860AVoltage-controlled attenuatorPIONEER ELECTRONIC CORP·Filed 1982·Granted Jan 29, 1985·7 cites·4 claims
- 1944US4258329ANoise suppression systemPIONEER ELECTRONIC CORP·Filed 1979·Granted Mar 24, 1981·4 cites·7 claims
- 2038US4418323AOscillator having capacitor charged and discharged by current mirror circuitsPIONEER ELECTRONIC CORP·Filed 1981·Granted Nov 29, 1983·4 cites·10 claims
- 2133US5043676AAutomatic level control circuitPIONEER ELECTRONIC CORP·Filed 1987·Granted Aug 27, 1991·2 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →