Inventor
UMEMOTO KIYOTAKA
JP34 patents
⚠️ This page may combine multiple inventors who share the name “UMEMOTO KIYOTAKA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ROHM CO LTD
31 patentsUS7148667B2Dec 12, 2006
Power supply apparatus
ROHM CO LTD32 citations92
US7046533B2May 16, 2006
DC/DC converter
ROHM CO LTD16 citations92
US6954055B2Oct 11, 2005
Switching device driving apparatus and DC/DC converter incorporating the same
ROHM CO LTD20 citations92
US6891736B2May 10, 2005
Multiphase DC/DC converter
ROHM CO LTD22 citations92
US6815939B2Nov 9, 2004
Switching power supply unit
ROHM CO LTD34 citations92
US6531853B2Mar 11, 2003
DC-DC converter
ROHM CO LTD28 citations92
US6448752B1Sep 10, 2002
Switching regulator
ROHM CO LTD28 citations92
US6369558B2Apr 9, 2002
Switching regulator
ROHM CO LTD30 citations92
US7612545B2Nov 3, 2009
DC/DC converter
ROHM CO LTD14 citations84
US7202652B2Apr 10, 2007
Motor driving apparatus incorporating switch device driving apparatus
ROHM CO LTD11 citations84
US7045915B2May 16, 2006
Power supply unit having multiple power supply outputs
ROHM CO LTD11 citations84
US6922042B2Jul 26, 2005
DC/DC converter
ROHM CO LTD18 citations84
US7595620B2Sep 29, 2009
Switching regulator
ROHM CO LTD8 citations83
US7486061B2Feb 3, 2009
Power supply apparatus
ROHM CO LTD7 citations74
US6949917B2Sep 27, 2005
Switching power supply unit
ROHM CO LTD7 citations74
US6894470B2May 17, 2005
Power supply device and electric appliance employing the same
ROHM CO LTD9 citations74
US10483227B2Nov 19, 2019
Semiconductor device
ROHM CO LTD2 citations73
US10355589B2Jul 16, 2019
Switching regulator
ROHM CO LTD3 citations73
US10276533B2Apr 30, 2019
Semiconductor device
ROHM CO LTD3 citations73
US10008932B2Jun 26, 2018
Synchronous rectification DC/DC converter
ROHM CO LTD4 citations73
US9984990B2May 29, 2018
Semiconductor device
ROHM CO LTD3 citations73
US9996097B2Jun 12, 2018
Constant voltage generating circuit
ROHM CO LTD3 citations72
US11011612B2May 18, 2021
Semiconductor device
ROHM CO LTD3 citations70
US9607927B2Mar 28, 2017
Semiconductor device
ROHM CO LTD1 citations63
US7095219B2Aug 22, 2006
Electric power supply unit having improved output voltage response
ROHM CO LTD2 citations63
US7061735B2Jun 13, 2006
Semiconductor device
ROHM CO LTD2 citations63
US6917189B2Jul 12, 2005
Electric power supply unit having improved output voltage response
ROHM CO LTD4 citations63
US10833037B2Nov 10, 2020
Semiconductor device
ROHM CO LTD0 citations52
US10281969B2May 7, 2019
Semiconductor package
ROHM CO LTD0 citations52
US7663355B2Feb 16, 2010
Power supply apparatus
ROHM CO LTD0 citations52
US10379564B2Aug 13, 2019
Constant voltage generating circuit
ROHM CO LTD0 citations51