Inventor
OKAMOTO KATSUMI
JP47 patents
⚠️ This page may combine multiple inventors who share the name “OKAMOTO KATSUMI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SEIKO EPSON CORP
36 patentsUS7885554B2Feb 8, 2011
Developing device, image forming apparatus, image forming system, cartridge, developing unit and photoconductor unit
SEIKO EPSON CORP46 citations92
US7155151B2Dec 26, 2006
Developer carrier, developing device, image forming apparatus and computer system
SEIKO EPSON CORP44 citations92
US7330681B2Feb 12, 2008
Developing device, image forming apparatus, and image forming system
SEIKO EPSON CORP14 citations84
US7242872B2Jul 10, 2007
Image forming apparatus with changeover control for development cartridges
SEIKO EPSON CORP10 citations84
US7224924B2May 29, 2007
Developing device, image forming apparatus, image forming system, and method of manufacturing developing device
SEIKO EPSON CORP11 citations84
US7076185B2Jul 11, 2006
Developing device, image forming apparatus, computer system, and seal-assisting member
SEIKO EPSON CORP11 citations84
US6868247B2Mar 15, 2005
Developing unit, developing device, image-forming apparatus, and computer system
SEIKO EPSON CORP15 citations84
US7565099B2Jul 21, 2009
Developing device and image forming apparatus having a toner-particle bearing roller with a helical groove portion
SEIKO EPSON CORP17 citations83
US9067419B2Jun 30, 2015
Recording apparatus
SEIKO EPSON CORP6 citations82
US7359662B2Apr 15, 2008
Image forming apparatus with control blade having an arcuate shape
SEIKO EPSON CORP7 citations74
USD500075SDec 21, 2004
Toner cartridge
SEIKO EPSON CORP10 citations74
US6823156B2Nov 23, 2004
Developing device, rotary developing units, image formation apparatus and a computer system with a thickness regulator member and a roller support frame
SEIKO EPSON CORP9 citations74
US6892039B2May 10, 2005
Connector having a built-in memory IC mounted on a development cartridge
SEIKO EPSON CORP10 citations72
US10737897B2Aug 11, 2020
Medium discharging device and method of controlling medium discharging device
SEIKO EPSON CORP4 citations71
US9834001B2Dec 5, 2017
Recording apparatus
SEIKO EPSON CORP3 citations71
US9085433B2Jul 21, 2015
Medium transport device and recording device
SEIKO EPSON CORP3 citations63
US7761037B2Jul 20, 2010
Image formation apparatus that replenishes developer based on detected height of developer and rotating speed of developer carrier
SEIKO EPSON CORP5 citations63
US7636538B2Dec 22, 2009
Layer-thickness restriction member, developing device, method for manufacturing restriction blade, and blade-forming mold
SEIKO EPSON CORP5 citations63
US7539443B2May 26, 2009
Charging roller and image forming apparatus
SEIKO EPSON CORP3 citations63
US7330684B2Feb 12, 2008
Developing device, image forming apparatus, image forming system, charging member, and method for manufacturing developing device
SEIKO EPSON CORP6 citations63
US7324775B2Jan 29, 2008
Image forming apparatus having developing device with sealing members and method of manufacture
SEIKO EPSON CORP4 citations63
US7257347B2Aug 14, 2007
Developer containing device, image forming apparatus, and image forming system with housing sections welded together by vibration welding
SEIKO EPSON CORP4 citations63
US7190920B2Mar 13, 2007
Developing cartridge, air communication unit of developing cartridge and toner cartridge
SEIKO EPSON CORP2 citations63
US6937835B2Aug 30, 2005
Developer charging unit, developing device, image-forming apparatus, and computer system
SEIKO EPSON CORP4 citations63
US9150023B2Oct 6, 2015
Recording apparatus
SEIKO EPSON CORP3 citations62
US7881644B2Feb 1, 2011
Developing device and image forming apparatus
SEIKO EPSON CORP4 citations62
US7783234B2Aug 24, 2010
Developer cartridge, image forming apparatus, and shutter device
SEIKO EPSON CORP6 citations62
US7406272B2Jul 29, 2008
Image forming apparatus and system with attachable and detachable developer container
SEIKO EPSON CORP4 citations61
US7068961B2Jun 27, 2006
Developing device, image forming apparatus, image forming system, sealing member, and method for manufacturing sealing member
SEIKO EPSON CORP2 citations61
US7403734B2Jul 22, 2008
Developing device, image forming apparatus, image forming system, and method of assembling developer supplying roller
SEIKO EPSON CORP3 citations60
US9114943B2Aug 25, 2015
Medium transport device and recording device
SEIKO EPSON CORP1 citations52
US7881641B2Feb 1, 2011
Developing cartridge, developing device, and image forming apparatus
SEIKO EPSON CORP1 citations51
US12377669B2Aug 5, 2025
Relay transport device, feeding system, recording system, and position adjustment method
SEIKO EPSON CORP0 citations50
US7822368B2Oct 26, 2010
Container for developing agent, and image forming apparatus incorporating the same
SEIKO EPSON CORP0 citations47
US7620348B2Nov 17, 2009
Container for developing agent, and image forming apparatus incorporating the same
SEIKO EPSON CORP0 citations47
US7974549B2Jul 5, 2011
Developing device and image forming apparatus
SEIKO EPSON CORP0 citations42