Inventor
NAGATA TSUTOMU
JP32 patents
⚠️ This page may combine multiple inventors who share the name “NAGATA TSUTOMU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SHARP KK
13 patentsUSD464079SOct 8, 2002
Toner cartridge
SHARP KK27 citations92
US6421517B1Jul 16, 2002
Toner supply device with rotatable agitating element
SHARP KK31 citations92
US6385422B1May 7, 2002
Developing unit equipped with a toner replenishing device configured with a conveying sheet and rotator
SHARP KK34 citations92
US6711374B2Mar 23, 2004
Image apparatus with developing cartridge having two accommodating portions
SHARP KK15 citations84
US6567631B2May 20, 2003
Toner cartridge and image forming apparatus
SHARP KK16 citations84
US6415126B2Jul 2, 2002
Developing unit with agitator and conveying sheet for toner
SHARP KK18 citations84
US6360066B1Mar 19, 2002
Developing apparatus having stirring shafts with elliptic stirring vanes
SHARP KK19 citations84
US7333746B2Feb 19, 2008
Developing device and image forming apparatus provided with same
SHARP KK7 citations74
US6272298B1Aug 7, 2001
Developer cartridge
SHARP KK10 citations74
USD462713SSep 10, 2002
Developing unit for an image forming apparatus
SHARP KK8 citations73
US6347207B1Feb 12, 2002
Developing unit and toner replenishing device with conveying apparatus
SHARP KK9 citations73
US6603940B2Aug 5, 2003
Detachable process cartridge for image forming apparatus
SHARP KK2 citations62
US7769309B2Aug 3, 2010
Image forming apparatus and method with process control for stably forming images
SHARP KK5 citations57
DAIICHI SEIYAKU CO
6 patentsUS7192968B2Mar 20, 2007
Ethylenediamine derivatives
DAIICHI SEIYAKU CO28 citations92
US7342014B2Mar 11, 2008
Diamine derivatives
DAIICHI SEIYAKU CO19 citations91
US6747023B1Jun 8, 2004
Sulfonyl derivatives
DAIICHI SEIYAKU CO33 citations91
US6525042B1Feb 25, 2003
Sulfonyl derivatives
DAIICHI SEIYAKU CO59 citations90
US7576135B2Aug 18, 2009
Diamine derivatives
DAIICHI SEIYAKU CO16 citations82
US7935824B2May 3, 2011
Ethylenediamine derivatives
DAIICHI SEIYAKU CO4 citations62
MITA INDUSTRIAL CO LTD
3 patentsUS5659859AAug 19, 1997
Developer agitating/conveying device
MITA INDUSTRIAL CO LTD51 citations90
US5722002AFeb 24, 1998
Latent electrostatic image developing device having a toner concentration detector
MITA INDUSTRIAL CO LTD35 citations89
US5510882AApr 23, 1996
Developing device having an improved agitation and conveyance device
MITA INDUSTRIAL CO LTD20 citations82