Inventor · disambiguated record
Masayuki Yasumura
Also filed as: YASUMURA MASAYUKI
63 granted patents·4 pending applications·1,333 citations·filing 1978–2007
99Inventor score
Top patents by PatentIndex Score
67 records- 0194US7339801B2Switching power supply circuitSONY CORP·Filed 2006·Granted Mar 4, 2008·53 cites·5 claims
- 0293US6687137B1Resonant switching power supply circuit with voltage doubler outputSONY CORP·Filed 2000·Granted Feb 3, 2004·90 cites·9 claims
- 0393US6317337B1Switching power supply circuitSONY CORP·Filed 2000·Granted Nov 13, 2001·54 cites·7 claims
- 0491US7301785B2Switching power supply circuitSONY CORP·Filed 2006·Granted Nov 27, 2007·35 cites·5 claims
- 0590US7170761B2Switching power supply circuitSONY CORP·Filed 2005·Granted Jan 30, 2007·32 cites·15 claims
- 0688US6366476B1Switching power supply apparatus with active clamp circuitSONY CORP·Filed 2001·Granted Apr 2, 2002·64 cites·4 claims
- 0787US4339792AVoltage regulator using saturable transformerYASUMURA MASAYUKI·Filed 1980·Granted Jul 13, 1982·39 cites·5 claims
- 0885US7423887B2Switching power supply circuitSONY CORP·Filed 2006·Granted Sep 9, 2008·13 cites·5 claims
- 0984US6341075B2High voltage stabilizing circuitSONY CORP·Filed 2001·Granted Jan 22, 2002·25 cites·3 claims
- 1082US6587358B1Switching power supply circuitSONY CORP·Filed 2000·Granted Jul 1, 2003·44 cites·9 claims
- 1180US4409523APincushion distortion correction apparatusSONY CORP·Filed 1981·Granted Oct 11, 1983·22 cites·6 claims
- 1280US4308495ATransformer for voltage regulatorsSONY CORP·Filed 1980·Granted Dec 29, 1981·22 cites·4 claims
- 1379US7209369B1Switching power supply circuitSONY CORP·Filed 2006·Granted Apr 24, 2007·15 cites·9 claims
- 1479US6262897B1Switching power circuit with secondary side parallel and series resonanceSONY CORP·Filed 2000·Granted Jul 17, 2001·37 cites·6 claims
- 1578US6831846B2Switching power source circuit with drive frequency variably controlled by switching elementSONY CORP·Filed 2002·Granted Dec 14, 2004·34 cites·8 claims
- 1677US7110268B2Switching power supply circuitSONY CORP·Filed 2005·Granted Sep 19, 2006·14 cites·15 claims
- 1776US7054167B2Switching power supply circuitSONY CORP·Filed 2004·Granted May 30, 2006·30 cites·11 claims
- 1876US6411528B1Switching power circuit and insulating converter transformerSONY CORP·Filed 2000·Granted Jun 25, 2002·16 cites·3 claims
- 1976US6396717B2Switching power supply having an improved power factor by voltage feedbackSONY CORP·Filed 2001·Granted May 28, 2002·31 cites·5 claims
- 2075US7388762B2Switching power supply circuitSONY CORP·Filed 2007·Granted Jun 17, 2008·12 cites·9 claims
- 2175US6320765B2Switching power circuitSONY CORP·Filed 2001·Granted Nov 20, 2001·30 cites·2 claims
- 2274US7242595B2Switching power supply circuitSONY CORP·Filed 2006·Granted Jul 10, 2007·12 cites·9 claims
- 2374US7193868B2Switching power supply circuitSONY CORP·Filed 2006·Granted Mar 20, 2007·4 cites·14 claims
- 2474US7167384B2Switching power circuitSONY CORP·Filed 2004·Granted Jan 23, 2007·28 cites·11 claims
- 2573US7286374B2Switching power supply circuitSONY CORP·Filed 2006·Granted Oct 23, 2007·11 cites·10 claims
- 2673US6515875B2Switching power supply circuitSONY CORP·Filed 2001·Granted Feb 4, 2003·28 cites·2 claims
- 2772US6747883B2Switching power supply circuitSONY CORP·Filed 2003·Granted Jun 8, 2004·26 cites·9 claims
- 2872US6496389B1Power factor improving switching circuitSONY CORP·Filed 2000·Granted Dec 17, 2002·27 cites·2 claims
- 2972US6370041B2Switching power supply circuit for generating DC high voltageSONY CORP·Filed 2001·Granted Apr 9, 2002·11 cites·6 claims
- 3071US7388760B2Switching power supply circuitSONY CORP·Filed 2006·Granted Jun 17, 2008·10 cites·8 claims
- 3171US6388902B1Switching power supply circuitSONY CORP·Filed 2000·Granted May 14, 2002·25 cites·15 claims
- 3270US7158389B2Switching power supply circuitSONY CORP·Filed 2003·Granted Jan 2, 2007·24 cites·7 claims
- 3370US6370043B1Switching power supply circuit formed as a composite resonance converterSONY CORP·Filed 2000·Granted Apr 9, 2002·24 cites·7 claims
- 3469US7447048B2Switching power supply circuitSONY CORP·Filed 2006·Granted Nov 4, 2008·9 cites·5 claims
- 3569US7218534B2Switching power supply circuitSONY CORP·Filed 2004·Granted May 15, 2007·22 cites·11 claims
- 3668US6577510B1Switching power supplySONY CORP·Filed 2000·Granted Jun 10, 2003·21 cites·8 claims
- 3767US7285875B2Resonant converter with outputs of different polaritiesSONY CORP·Filed 2005·Granted Oct 23, 2007·8 cites·5 claims
- 3867US6452817B1Switching power supply circuitSONY CORP·Filed 2001·Granted Sep 17, 2002·20 cites·1 claims
- 3966US6839245B2Switching power supply circuitSONY CORP·Filed 2002·Granted Jan 4, 2005·20 cites·10 claims
- 4066US6456509B1Power loss of switching power supply circuit for supplying constant voltageSONY CORP·Filed 2001·Granted Sep 24, 2002·20 cites·6 claims
- 4165US7145785B2Switching power supply circuitSONY CORP·Filed 2005·Granted Dec 5, 2006·7 cites·11 claims
- 4264US6590787B2Wide range zero voltage switching resonance type converterSONY CORP·Filed 2001·Granted Jul 8, 2003·13 cites·6 claims
- 4363US6349046B2Switching power supply circuitSONY CORP·Filed 2001·Granted Feb 19, 2002·17 cites·5 claims
- 4463US4215296ATelevision deflection circuitSONY CORP·Filed 1978·Granted Jul 29, 1980·10 cites·3 claims
- 4562US7656686B2Switching power supply circuitSONY CORP·Filed 2007·Granted Feb 2, 2010·6 cites·9 claims
- 4662US5216585ASwitching power source deviceSONY CORP·Filed 1992·Granted Jun 1, 1993·28 cites·2 claims
- 4760US7298634B2Switching power supply circuitSONY CORP·Filed 2003·Granted Nov 20, 2007·15 cites·7 claims
- 4860US6301129B1Switching power supply circuitSONY CORP·Filed 2000·Granted Oct 9, 2001·15 cites·4 claims
- 4959US6310786B1Switching power-supply circuitSONY CORP·Filed 2000·Granted Oct 30, 2001·14 cites·2 claims
- 5058US7095629B2Switching power supply circuitSONY CORP·Filed 2004·Granted Aug 22, 2006·13 cites·8 claims
Showing the top 50 of 67 patent records by PatentIndex Score.
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