Inventor · disambiguated record
Masao Noro
Also filed as: NORO MASAO
101 granted patents·16 pending applications·1,527 citations·filing 1981–2025
99Inventor score
Top patents by PatentIndex Score
117 records- 0196US6018262ACMOS differential amplifier for a delta sigma modulator applicable for an analog-to-digital converterYAMAHA CORP·Filed 1998·Granted Jan 25, 2000·137 cites·13 claims
- 0293US4943956ADriving apparatusYAMAHA CORP·Filed 1989·Granted Jul 24, 1990·148 cites·19 claims
- 0392US7253350B2Vibration source driving deviceYAMAHA CORP·Filed 2004·Granted Aug 7, 2007·100 cites·36 claims
- 0491US11683637B2Signal converterYAMAHA CORP·Filed 2022·Granted Jun 20, 2023·2 cites·9 claims
- 0591US4980920ANegative impedance driving apparatus having temperature compensation circuitYAMAHA CORP·Filed 1989·Granted Dec 25, 1990·41 cites·12 claims
- 0691US4498057APower amplifier with power supply switchingNIPPON MUSICAL INSTRUMENTS MFG·Filed 1982·Granted Feb 5, 1985·38 cites·20 claims
- 0789US7268621B2Digital amplifierYAMAHA CORP·Filed 2005·Granted Sep 11, 2007·27 cites·7 claims
- 0889US6791405B2Triangular wave generating circuit used in a Class-D amplifierYAMAHA CORP·Filed 2003·Granted Sep 14, 2004·44 cites·4 claims
- 0989US6445320B1A/D conversion apparatusYAMAHA CORP·Filed 2000·Granted Sep 3, 2002·44 cites·20 claims
- 1087US7209374B2Capacitor-input positive and negative power supply circuitYAMAHA CORP·Filed 2003·Granted Apr 24, 2007·56 cites·7 claims
- 1184US7119499B2Switching power deviceYAMAHA CORP·Filed 2005·Granted Oct 10, 2006·13 cites·6 claims
- 1283US9379679B2Self-oscillating class-D amplifier and self-oscillating frequency control method for self-oscillating class-D amplifierYAMAHA CORP·Filed 2012·Granted Jun 28, 2016·6 cites·10 claims
- 1383US7481295B2Speaker system and speaker enclosureYAMAHA CORP·Filed 2006·Granted Jan 27, 2009·12 cites·4 claims
- 1482US6707337B2Self-operating PWM amplifierYAMAHA CORP·Filed 2002·Granted Mar 16, 2004·29 cites·6 claims
- 1580US5939931ADriving circuit having differential and H-bridge circuits for low voltage power sourceYAMAHA CORP·Filed 1997·Granted Aug 17, 1999·38 cites·5 claims
- 1679US9106988B2Electroacoustic transducerYAMAHA CORP·Filed 2014·Granted Aug 11, 2015·4 cites·12 claims
- 1778US10142736B2Electroacoustic transducerYAMAHA CORP·Filed 2015·Granted Nov 27, 2018·3 cites·15 claims
- 1878US9647614B2Power amplifierYAMAHA CORP·Filed 2015·Granted May 9, 2017·4 cites·5 claims
- 1976US12425775B2Magnetic circuit for acoustic transducer, and speaker unitYAMAHA CORP·Filed 2023·Granted Sep 23, 2025·0 cites·6 claims
- 2075US6448856B2Electronic volume circuitYAMAHA CORP·Filed 2001·Granted Sep 10, 2002·15 cites·6 claims
- 2175US5036228ATemperature compensation circuit for negative impedance driving apparatusYAMAHA CORP·Filed 1990·Granted Jul 30, 1991·22 cites·2 claims
- 2275US4406990ADirect coupled DC amplification circuitSTAX IND LTD·Filed 1981·Granted Sep 27, 1983·18 cites·3 claims
- 2374US6859096B2Class D amplifierYAMAHA CORP·Filed 2003·Granted Feb 22, 2005·20 cites·5 claims
- 2474US6428671B1Method and apparatus for electro-coagulation printing and electrode control unitYAMAHA CORP·Filed 2000·Granted Aug 6, 2002·9 cites·17 claims
- 2574US4944020ATemperature compensation circuit for negative impedance driving apparatusYAMAHA CORP·Filed 1989·Granted Jul 24, 1990·17 cites·2 claims
- 2673US7301094B1Device for driving vibration sourceYAMAHA CORP·Filed 2000·Granted Nov 27, 2007·21 cites·7 claims
- 2773US6778011B2Pulse-width modulation circuit and power amplifier circuitYAMAHA CORP·Filed 2002·Granted Aug 17, 2004·17 cites·11 claims
- 2873US4812846ADither circuit using dither including signal component having frequency half of sampling frequencyYAMAHA CORP·Filed 1988·Granted Mar 14, 1989·37 cites·6 claims
- 2972US9398376B2Electroacoustic transducerYAMAHA CORP·Filed 2014·Granted Jul 19, 2016·3 cites·15 claims
- 3072US5347230AAmplification circuitYAMAHA CORP·Filed 1992·Granted Sep 13, 1994·23 cites·8 claims
- 3170US5757299AAnalog-Digital converter using delta sigma modulation digital filtering, and gain-scalingYAMAHA CORP·Filed 1995·Granted May 26, 1998·27 cites·7 claims
- 3269US9680432B2Power amplifier and input signal adjusting methodYAMAHA CORP·Filed 2016·Granted Jun 13, 2017·2 cites·12 claims
- 3369US5459650APower supply circuitYAMAHA CORP·Filed 1992·Granted Oct 17, 1995·37 cites·2 claims
- 3467US6111532AWaveform shaper and sigma-delta D/A converterYAMAHA CORP·Filed 1998·Granted Aug 29, 2000·28 cites·10 claims
- 3566US8094842B2Loudspeaker system and loudspeaker enclosureNORO MASAO·Filed 2007·Granted Jan 10, 2012·5 cites·2 claims
- 3666US6885532B2Current detection and overcurrent protection for transistors in pulse-width modulation amplifierYAMAHA CORP·Filed 2002·Granted Apr 26, 2005·13 cites·7 claims
- 3765US6696891B2Class D amplifierYAMAHA CORP·Filed 2002·Granted Feb 24, 2004·13 cites·4 claims
- 3865US6437719B1Delta-sigma modulator for power amplification of audio signalsYAMAHA CORP·Filed 2001·Granted Aug 20, 2002·13 cites·6 claims
- 3964US6061279ADelay circuit for analog signalsYAMAHA CORP·Filed 1999·Granted May 9, 2000·23 cites·14 claims
- 4064US5818372AD/A converter circuit having offset voltage application deviceYAMAHA CORP·Filed 1996·Granted Oct 6, 1998·24 cites·13 claims
- 4163US6980058B2Amplifier circuitryYAMAHA CORP·Filed 2003·Granted Dec 27, 2005·11 cites·7 claims
- 4263US6600350B2Power-on/off reset circuitYAMAHA CORP·Filed 2002·Granted Jul 29, 2003·10 cites·14 claims
- 4363US5297211AAcoustic device for custom installationYAMAHA CORP·Filed 1992·Granted Mar 22, 1994·33 cites·5 claims
- 4462US4447791APower supply changeover type power amplifierNIPPON MUSICAL INSTRUMENTS MFG·Filed 1982·Granted May 8, 1984·11 cites·12 claims
- 4562US2024429877A1Power Amplifying DeviceYAMAHA CORP·Filed 2024·Application pending·0 cites
- 4661US11756715B2Signal converterYAMAHA CORP·Filed 2022·Granted Sep 12, 2023·0 cites·14 claims
- 4761US8050424B2Speaker system, audio amplifier and audio systemYAMAHA CORP·Filed 2005·Granted Nov 1, 2011·2 cites·8 claims
- 4861US7986792B2Adapter connectable between audio amplifier and transmitter for cordless speakerYAMAHA CORP·Filed 2005·Granted Jul 26, 2011·2 cites·6 claims
- 4961US6937091B2Class D amplifierYAMAHA CORP·Filed 2003·Granted Aug 30, 2005·11 cites·4 claims
- 5061US2022270580A1Input device and sound signal generation deviceYAMAHA CORP·Filed 2022·Application pending·0 cites
Showing the top 50 of 117 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →