Inventor · disambiguated record
Toshio Kumagai
Also filed as: KUMAGAI TOSHIO
131 granted patents·22 pending applications·1,957 citations·filing 1989–2023
99Inventor score
Top patents by PatentIndex Score
153 records- 0198US8336999B2Liquid supply methodMATSUMOTO HITOSHI·Filed 2010·Granted Dec 25, 2012·21 cites·8 claims
- 0298US6582068B2Ink cartridge, and ink-jet recording apparatus using the sameSEIKO EPSON CORP·Filed 2002·Granted Jun 24, 2003·136 cites·6 claims
- 0397US10005288B2Liquid ejecting apparatusSEIKO EPSON CORP·Filed 2017·Granted Jun 26, 2018·6 cites·13 claims
- 0497US9884487B2Ink jet recording method, ultraviolet-ray curable ink, and ink jet recording apparatusSEIKO EPSON CORP·Filed 2015·Granted Feb 6, 2018·9 cites·13 claims
- 0597US7524044B2Liquid ejection apparatus and method for supplying liquid in liquid ejection apparatusSEIKO EPSON CORP·Filed 2006·Granted Apr 28, 2009·28 cites·10 claims
- 0697US7152965B2Ink cartridge, and ink-jet recording apparatus using the sameSEIKO EPSON CORP·Filed 2001·Granted Dec 26, 2006·62 cites·92 claims
- 0797US6796627B2Ink jet recording apparatus, method of replenishing ink to subtank in the apparatus, and method of checking the replenished amount of inkSEIKO EPSON CORP·Filed 2001·Granted Sep 28, 2004·111 cites·60 claims
- 0897US5841456ATransfer printing apparatus with dispersion medium removal memberSEIKO EPSON CORP·Filed 1992·Granted Nov 24, 1998·126 cites·14 claims
- 0996US8021139B2Three-dimensional object forming apparatus and method for forming three dimensional objectSEIKO EPSON CORP·Filed 2010·Granted Sep 20, 2011·18 cites·14 claims
- 1096US7806523B2Liquid ejecting apparatus and liquid container holder thereofSEIKO EPSON CORP·Filed 2005·Granted Oct 5, 2010·29 cites·8 claims
- 1196US7156507B2Liquid injectorSEIKO EPSON CORP·Filed 2002·Granted Jan 2, 2007·44 cites·46 claims
- 1296US6758556B2Ink cartridge, and ink-jet recording apparatus using the sameSEIKO EPSON CORP·Filed 2002·Granted Jul 6, 2004·52 cites·59 claims
- 1395US10029483B2Ink jet recording method, ultraviolet-ray curable ink, and ink jet recording apparatusSEIKO EPSON CORP·Filed 2013·Granted Jul 24, 2018·9 cites·17 claims
- 1495US8939562B2Liquid discharging apparatus and control method thereofSEIKO EPSON CORP·Filed 2014·Granted Jan 27, 2015·9 cites·5 claims
- 1595US7845750B2Ink jet type recording apparatus, ink type information setting method in the apparatus and ink cartridge used in the apparatusSEIKO EPSON CORP·Filed 2007·Granted Dec 7, 2010·18 cites·12 claims
- 1695US7784923B2Ink cartridge, and ink-jet recording apparatus using the sameSEIKO EPSON CORP·Filed 2006·Granted Aug 31, 2010·15 cites·18 claims
- 1795US6547363B1Ink cartridge, ink jet type printing apparatus using the same, and ink cartridge change control method in the apparatusSEIKO EPSON CORP·Filed 2000·Granted Apr 15, 2003·104 cites·44 claims
- 1895US5623296AIntermediate transfer ink jet recording methodSEIKO EPSON CORP·Filed 1993·Granted Apr 22, 1997·123 cites·20 claims
- 1994US9421784B2Liquid ejecting apparatusSEIKO EPSON CORP·Filed 2015·Granted Aug 23, 2016·5 cites·4 claims
- 2094US7997703B2Liquid containerSEIKO EPSON CORP·Filed 2008·Granted Aug 16, 2011·16 cites·7 claims
- 2193US10625519B2Ink jet recording method, ultraviolet-ray curable ink, and ink jet recording apparatusSEIKO EPSON CORP·Filed 2018·Granted Apr 21, 2020·3 cites·12 claims
- 2293US7404628B2Liquid containerSEIKO EPSON CORP·Filed 2004·Granted Jul 29, 2008·43 cites·51 claims
- 2393US7278718B2Liquid injecting apparatusSEIKO EPSON CORP·Filed 2003·Granted Oct 9, 2007·47 cites·38 claims
- 2493USD321900SInk cartridgeSEIKO EPSON CORP·Filed 1989·Granted Nov 26, 1991·38 cites·1 claims
- 2592US11077677B2Ink jet recording method, ultraviolet-ray curable ink, and ink jet recording apparatusSEIKO EPSON CORP·Filed 2020·Granted Aug 3, 2021·2 cites·20 claims
- 2692US7077512B2Ink jet type recording apparatus, ink type information setting method in the apparatus and ink cartridge used in the apparatusSEIKO EPSON CORP·Filed 2001·Granted Jul 18, 2006·33 cites·44 claims
- 2792US5129803AConcrete leveling machineSHIMIZU CONSTRUCTION CO LTD·Filed 1989·Granted Jul 14, 1992·105 cites·13 claims
- 2891US7780277B2Liquid injecting apparatusSEIKO EPSON CORP·Filed 2006·Granted Aug 24, 2010·6 cites·6 claims
- 2990US8579422B2Flow path unit and image forming apparatus that includes flow path unitMATSUOKA HIROKI·Filed 2012·Granted Nov 12, 2013·6 cites·6 claims
- 3090US7862320B2Three-dimensional object forming apparatus and method for forming three dimensional objectSEIKO EPSON CORP·Filed 2008·Granted Jan 4, 2011·11 cites·13 claims
- 3190US7387377B2Liquid ejection apparatus and method for driving the sameSEIKO EPSON CORP·Filed 2005·Granted Jun 17, 2008·12 cites·5 claims
- 3290US6866355B2Ink jet recording apparatus, and method of supplying ink to sub-tank of the ink jet recording apparatusSEIKO EPSON CORP·Filed 2001·Granted Mar 15, 2005·37 cites·11 claims
- 3390US6676237B2Ink jet recording apparatus and method of correcting calculation of ink amount consumed thereinSEIKO EPSON CORP·Filed 2002·Granted Jan 13, 2004·37 cites·21 claims
- 3490US5847736AInk jet recorder and recording head cleaning methodSEIKO EPSON CORP·Filed 1995·Granted Dec 8, 1998·78 cites·34 claims
- 3588US10589529B2Printing apparatus and printing methodSEIKO EPSON CORP·Filed 2018·Granted Mar 17, 2020·2 cites·11 claims
- 3688US8783826B2Fluid ejecting apparatus and method of controlling the fluid ejecting apparatusSEIKO EPSON CORP·Filed 2013·Granted Jul 22, 2014·3 cites·9 claims
- 3788US8596775B2Filter unit, liquid ejecting apparatus, and bubble removal methodKOIKE KAORU·Filed 2012·Granted Dec 3, 2013·4 cites·7 claims
- 3888US8033656B2Liquid feeding device and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2011·Granted Oct 11, 2011·4 cites·12 claims
- 3988US7699449B2Liquid injection apparatus and method for driving the sameSEIKO EPSON CORP·Filed 2005·Granted Apr 20, 2010·9 cites·7 claims
- 4088US7413296B2Liquid supplying member, method of manufacturing the same, and liquid ejection apparatus incorporating the sameSEIKO EPSON CORP·Filed 2006·Granted Aug 19, 2008·9 cites·9 claims
- 4187US11072185B2Liquid ejecting apparatusSEIKO EPSON CORP·Filed 2020·Granted Jul 27, 2021·2 cites·7 claims
- 4287US8919917B2Liquid ejecting apparatus and method of cleaning liquid ejecting head of liquid ejecting apparatusKOIKE KAORU·Filed 2010·Granted Dec 30, 2014·8 cites·6 claims
- 4387US7874658B2Liquid injection apparatus and method for driving the sameSEIKO EPSON CORP·Filed 2008·Granted Jan 25, 2011·8 cites·2 claims
- 4487US5831655AInk jet recording apparatusSEIKO EPSON CORP·Filed 1996·Granted Nov 3, 1998·65 cites·10 claims
- 4586US5260724ACapping device for ink jet printerSEIKO EPSON CORP·Filed 1991·Granted Nov 9, 1993·55 cites·13 claims
- 4685US8398190B2Fluid ejection device and fluid stirring method for the same, and fluid storage device and fluid stirring method for the sameKUMAGAI TOSHIO·Filed 2011·Granted Mar 19, 2013·4 cites·15 claims
- 4785US8186814B2Liquid injecting apparatusARUGA YOSHIHARU·Filed 2010·Granted May 29, 2012·2 cites·8 claims
- 4884US9616669B2Liquid ejecting apparatusSEIKO EPSON CORP·Filed 2015·Granted Apr 11, 2017·1 cites·12 claims
- 4983US8967776B2Liquid ejection apparatusSEIKO EPSON CORP·Filed 2014·Granted Mar 3, 2015·1 cites·18 claims
- 5083US8708467B2Liquid injecting apparatusSEIKO EPSON CORP·Filed 2013·Granted Apr 29, 2014·1 cites·5 claims
Showing the top 50 of 153 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →