Inventor
YAMADA TOMOYASU
JP38 patents
⚠️ This page may combine multiple inventors who share the name “YAMADA TOMOYASU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SANKEN ELECTRIC CO LTD
14 patentsUS6714425B2Mar 30, 2004
Power factor corrected SMPS with light and heavy load control modes
SANKEN ELECTRIC CO LTD126 citations98
US6445598B1Sep 3, 2002
Dc-dc converter
SANKEN ELECTRIC CO LTD104 citations98
US6980446B2Dec 27, 2005
Circuit for starting power source apparatus
SANKEN ELECTRIC CO LTD83 citations96
US6972970B2Dec 6, 2005
Dc-to-dc converter
SANKEN ELECTRIC CO LTD64 citations96
US6842350B2Jan 11, 2005
Dc-to-dc converter with flyback period detector circuit
SANKEN ELECTRIC CO LTD115 citations96
US6134123AOct 17, 2000
Switch-mode DC power supply, monolithic IC and hybrid IC for the same
SANKEN ELECTRIC CO LTD84 citations96
US6842353B2Jan 11, 2005
Switching power supply, and a method of driving the same
SANKEN ELECTRIC CO LTD63 citations94
US7272018B2Sep 18, 2007
Switching power supply device and method for controlling switching power supply device
SANKEN ELECTRIC CO LTD27 citations93
US6882551B2Apr 19, 2005
Switching power supply device
SANKEN ELECTRIC CO LTD38 citations93
US7542308B2Jun 2, 2009
DC-DC converter
SANKEN ELECTRIC CO LTD30 citations92
US5793621AAug 11, 1998
Switching power supply for computer-driven displays or the like
SANKEN ELECTRIC CO LTD24 citations92
US7639516B2Dec 29, 2009
Switching power source device
SANKEN ELECTRIC CO LTD11 citations84
US7064966B2Jun 20, 2006
Switching dc power supply
SANKEN ELECTRIC CO LTD14 citations79
US7271579B2Sep 18, 2007
AC signal level detection circuit
SANKEN ELECTRIC CO LTD9 citations73
PIONEER ELECTRONIC CORP
7 patentsUS5003411AMar 26, 1991
Method for recording/reproducing and searching digital signals using a helical scan type rotary head
PIONEER ELECTRONIC CORP19 citations73
US4930031AMay 29, 1990
Apparatus for recording and reproducing digital signals using a helical scan
PIONEER ELECTRONIC CORP7 citations73
US5267095ANov 30, 1993
Digital reconstructing of harmonics to extend band of frequency response
PIONEER ELECTRONIC CORP9 citations72
US5469307ANov 21, 1995
Magnetic tape recording/playback apparatus for automatically detecting a desired program
PIONEER ELECTRONIC CORP11 citations71
US4992892AFeb 12, 1991
Music start signals in a magnetic recording/reproducing device
PIONEER ELECTRONIC CORP10 citations69
US4991040AFeb 5, 1991
Tape recorder which displays unrecorded time on magnetic tapes
PIONEER ELECTRONIC CORP6 citations60
US4864436ASep 5, 1989
Rotary head digital audio recording/reproducing apparatus
PIONEER ELECTRONIC CORP1 citations51
KYOCERA DOCUMENT SOLUTIONS INC
6 patentsUS11906922B2Feb 20, 2024
Sorting device and image forming apparatus therewith
KYOCERA DOCUMENT SOLUTIONS INC0 citations52
US11427426B2Aug 30, 2022
Sorting device and image forming apparatus provided therewith
KYOCERA DOCUMENT SOLUTIONS INC0 citations52
US11415924B2Aug 16, 2022
Sorting device and image forming apparatus therewith
KYOCERA DOCUMENT SOLUTIONS INC0 citations52
US11314194B2Apr 26, 2022
Lighting device, static eliminating device, and image forming apparatus therewith
KYOCERA DOCUMENT SOLUTIONS INC0 citations51
US10824091B2Nov 3, 2020
Development device and image forming apparatus
KYOCERA DOCUMENT SOLUTIONS INC0 citations51
US10824093B2Nov 3, 2020
Development device and image forming apparatus
KYOCERA DOCUMENT SOLUTIONS INC0 citations40
PIONEER CORP
5 patentsUS7145839B2Dec 5, 2006
Apparatus for editing management information to be recorded on an information storage medium
PIONEER CORP4 citations74
US7369464B2May 6, 2008
Editing device capable of changing the displaying mode of management information
PIONEER CORP0 citations52
US7327641B2Feb 5, 2008
Editing device capable of displaying logical positions of tracks
PIONEER CORP0 citations52
US7187628B2Mar 6, 2007
Editing device capable of imparting group management information to each recording track
PIONEER CORP0 citations52
US7200090B2Apr 3, 2007
Information recording apparatus including information attaching and generating device which generates group control information
PIONEER CORP0 citations36