Inventor
YASUMURA MASAYUKI
JP63 patents
⚠️ This page may combine multiple inventors who share the name “YASUMURA MASAYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SONY CORP
49 patentsUS6687137B1Feb 3, 2004
Resonant switching power supply circuit with voltage doubler output
SONY CORP90 citations98
US6366476B1Apr 2, 2002
Switching power supply apparatus with active clamp circuit
SONY CORP64 citations96
US7339801B2Mar 4, 2008
Switching power supply circuit
SONY CORP53 citations93
US7301785B2Nov 27, 2007
Switching power supply circuit
SONY CORP35 citations93
US7218534B2May 15, 2007
Switching power supply circuit
SONY CORP22 citations93
US7170761B2Jan 30, 2007
Switching power supply circuit
SONY CORP32 citations93
US7167384B2Jan 23, 2007
Switching power circuit
SONY CORP28 citations93
US7158389B2Jan 2, 2007
Switching power supply circuit
SONY CORP24 citations93
US7054167B2May 30, 2006
Switching power supply circuit
SONY CORP30 citations93
US6831846B2Dec 14, 2004
Switching power source circuit with drive frequency variably controlled by switching element
SONY CORP34 citations93
US6747883B2Jun 8, 2004
Switching power supply circuit
SONY CORP26 citations93
US6587358B1Jul 1, 2003
Switching power supply circuit
SONY CORP44 citations93
US6577510B1Jun 10, 2003
Switching power supply
SONY CORP21 citations93
US6515875B2Feb 4, 2003
Switching power supply circuit
SONY CORP28 citations93
US6496389B1Dec 17, 2002
Power factor improving switching circuit
SONY CORP27 citations93
US6396717B2May 28, 2002
Switching power supply having an improved power factor by voltage feedback
SONY CORP31 citations93
US6388902B1May 14, 2002
Switching power supply circuit
SONY CORP25 citations93
US6370043B1Apr 9, 2002
Switching power supply circuit formed as a composite resonance converter
SONY CORP24 citations93
US6341075B2Jan 22, 2002
High voltage stabilizing circuit
SONY CORP25 citations93
US6320765B2Nov 20, 2001
Switching power circuit
SONY CORP30 citations93
US6317337B1Nov 13, 2001
Switching power supply circuit
SONY CORP54 citations93
US6262897B1Jul 17, 2001
Switching power circuit with secondary side parallel and series resonance
SONY CORP37 citations93
US5450307ASep 12, 1995
Switching power source apparatus
SONY CORP23 citations93
US5216585AJun 1, 1993
Switching power source device
SONY CORP28 citations93
US7447048B2Nov 4, 2008
Switching power supply circuit
SONY CORP9 citations84
US7423887B2Sep 9, 2008
Switching power supply circuit
SONY CORP13 citations84
US7388762B2Jun 17, 2008
Switching power supply circuit
SONY CORP12 citations84
US7388760B2Jun 17, 2008
Switching power supply circuit
SONY CORP10 citations84
US7298634B2Nov 20, 2007
Switching power supply circuit
SONY CORP15 citations84
US7286374B2Oct 23, 2007
Switching power supply circuit
SONY CORP11 citations84
US7242595B2Jul 10, 2007
Switching power supply circuit
SONY CORP12 citations84
US7209369B1Apr 24, 2007
Switching power supply circuit
SONY CORP15 citations84
US7110268B2Sep 19, 2006
Switching power supply circuit
SONY CORP14 citations84
US7095629B2Aug 22, 2006
Switching power supply circuit
SONY CORP13 citations84
US6839245B2Jan 4, 2005
Switching power supply circuit
SONY CORP20 citations84
US6590787B2Jul 8, 2003
Wide range zero voltage switching resonance type converter
SONY CORP13 citations84
US6456509B1Sep 24, 2002
Power loss of switching power supply circuit for supplying constant voltage
SONY CORP20 citations84
US6452817B1Sep 17, 2002
Switching power supply circuit
SONY CORP20 citations84
US6411528B1Jun 25, 2002
Switching power circuit and insulating converter transformer
SONY CORP16 citations84
US6349046B2Feb 19, 2002
Switching power supply circuit
SONY CORP17 citations84
US6301129B1Oct 9, 2001
Switching power supply circuit
SONY CORP15 citations84
US4409523AOct 11, 1983
Pincushion distortion correction apparatus
SONY CORP22 citations82
US4308495ADec 29, 1981
Transformer for voltage regulators
SONY CORP22 citations82
US7310249B2Dec 18, 2007
Switching power supply circuit
SONY CORP7 citations74
US7285875B2Oct 23, 2007
Resonant converter with outputs of different polarities
SONY CORP8 citations74
US7145785B2Dec 5, 2006
Switching power supply circuit
SONY CORP7 citations74
US6370041B2Apr 9, 2002
Switching power supply circuit for generating DC high voltage
SONY CORP11 citations74
US6356465B2Mar 12, 2002
Switching power supply apparatus with active clamp circuit
SONY CORP13 citations74
US6310786B1Oct 30, 2001
Switching power-supply circuit
SONY CORP14 citations74
YASUMURA MASAYUKI
1 patentShowing the top 50 of 63 patents by PatentIndex Score.