Inventor
OKA SEIJI
JP57 patents
⚠️ This page may combine multiple inventors who share the name “OKA SEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
RICOH KK
18 patentsUS5805965ASep 8, 1998
Developing device for an image forming apparatus having developer distribution features
RICOH KK83 citations96
US5771426AJun 23, 1998
Developing device using a toner and carrier mixture
RICOH KK67 citations96
US5758241AMay 26, 1998
Developing device for an image forming apparatus
RICOH KK56 citations96
US5416568AMay 16, 1995
Developing unit for an image forming apparatus
RICOH KK67 citations96
US5235384AAug 10, 1993
Image forming apparatus with replaceable process units
RICOH KK72 citations96
US5109254AApr 28, 1992
Developing apparatus
RICOH KK101 citations96
US5983059ANov 9, 1999
Recyclable toner container for an image forming apparatus
RICOH KK66 citations95
US5659860AAug 19, 1997
Developing device for an image forming apparatus and toner cartridge
RICOH KK84 citations94
US4969557ANov 13, 1990
Toner cartridge
RICOH KK30 citations93
US4799608AJan 24, 1989
Toner cartridge
RICOH KK33 citations93
US4800411AJan 24, 1989
Magnetic brush development device for electrostatic latent images
RICOH KK42 citations93
US5822664AOct 13, 1998
Developing machine which uses a developing agent including a toner and magnetic particles
RICOH KK51 citations92
US5771429AJun 23, 1998
Developing device capable of automatic toner content control
RICOH KK42 citations92
US5255059AOct 19, 1993
Image forming apparatus
RICOH KK27 citations92
US4650070AMar 17, 1987
Toner cartridge
RICOH KK47 citations92
US5555469ASep 10, 1996
Image forming apparatus having toner recycling device with electrostatic conveyor
RICOH KK10 citations74
US5077584ADec 31, 1991
Toner supply device for electrophotographic equipment
RICOH KK15 citations74
US6108511AAug 22, 2000
Toner collecting and reusing device for use in an image forming apparatus and a method thereof
RICOH KK11 citations73
MITSUBISHI ELECTRIC CORP
12 patentsUS7038143B2May 2, 2006
Wiring board, fabrication method of wiring board, and semiconductor device
MITSUBISHI ELECTRIC CORP13 citations81
US6664127B2Dec 16, 2003
Method of manufacturing multi-layer printed wiring board
MITSUBISHI ELECTRIC CORP15 citations81
US4882389ANov 21, 1989
Electrical insulating resin
MITSUBISHI ELECTRIC CORP7 citations72
US4603180AJul 29, 1986
Thermosetting resin composition
MITSUBISHI ELECTRIC CORP8 citations72
US4591623AMay 27, 1986
Thermosetting resin composition
MITSUBISHI ELECTRIC CORP10 citations72
US6451710B1Sep 17, 2002
Method of manufacturing multi-layer printed wiring board
MITSUBISHI ELECTRIC CORP10 citations71
US6629362B2Oct 7, 2003
Method of manufacturing a circuit print board
MITSUBISHI ELECTRIC CORP6 citations70
US5661223AAug 26, 1997
Composition of phenolic resin-modified epoxy resin and straight chain polymer
MITSUBISHI ELECTRIC CORP3 citations61
US5091481AFeb 25, 1992
Composition of polyepoxy compounds, linear polymer and aromatic diamine
MITSUBISHI ELECTRIC CORP2 citations61
US9196604B2Nov 24, 2015
Power semiconductor module having pattern laminated region
MITSUBISHI ELECTRIC CORP1 citations51
US11735514B2Aug 22, 2023
Semiconductor device and power conversion device
MITSUBISHI ELECTRIC CORP0 citations50
US10559659B2Feb 11, 2020
Power semiconductor device
MITSUBISHI ELECTRIC CORP0 citations49
OKA SEIJI
10 patentsUS8502385B2Aug 6, 2013
Power semiconductor device
OKA SEIJI14 citations84
US8304882B2Nov 6, 2012
Power semiconductor device
OKA SEIJI6 citations84
US8436459B2May 7, 2013
Power semiconductor module
OKA SEIJI18 citations83
US8299601B2Oct 30, 2012
Power semiconductor module and manufacturing method thereof
OKA SEIJI10 citations83
US8319333B2Nov 27, 2012
Power semiconductor module
OKA SEIJI6 citations72
US8575745B2Nov 5, 2013
Power semiconductor device, printed wiring board, and mechanism for connecting the power semiconductor device and the printed wiring board
OKA SEIJI5 citations71
US8741695B2Jun 3, 2014
Semiconductor device and method of manufacturing the same
OKA SEIJI3 citations62
US8299603B2Oct 30, 2012
Power semiconductor device
OKA SEIJI4 citations62
US8313986B2Nov 20, 2012
Method of manufacturing power semiconductor device
OKA SEIJI0 citations52
US8610261B2Dec 17, 2013
Power semiconductor device
OKA SEIJI1 citations51
DAIKIN IND LTD
3 patentsUS10508849B2Dec 17, 2019
Air conditioner with outdoor temperature sensing correlated to outdoor fan control
DAIKIN IND LTD2 citations68
US7849706B2Dec 14, 2010
Indoor unit of an air conditioner
DAIKIN IND LTD6 citations62
US11835245B2Dec 5, 2023
Air conditioning system, and indoor unit of same
DAIKIN IND LTD0 citations56
OBIRAKI YOSHIKO
2 patentsOMRON TATEISI ELECTRONICS CO
2 patentsUS6807072B2Oct 19, 2004
Electric power conversion device with push-pull circuitry
OMRON TATEISI ELECTRONICS CO10 citations71
US7630794B2Dec 8, 2009
Isolated operation detecting method, control apparatus for detecting isolated operation for distributed power supply
OMRON TATEISI ELECTRONICS CO2 citations61
OI TAKESHI
2 patentsSHIOTA HIROKI
1 patentShowing the top 50 of 57 patents by PatentIndex Score.