Inventor · disambiguated record
Keiji Tomizawa
Also filed as: TOMIZAWA KEIJI
56 granted patents·7 pending applications·331 citations·filing 2003–2025
98Inventor score
Top patents by PatentIndex Score
63 records- 0196US6830317B2Ink jet recording headCANON KK·Filed 2003·Granted Dec 14, 2004·77 cites·30 claims
- 0294US8087759B2Print head with offset ejection portsOIKAWA MASAKI·Filed 2009·Granted Jan 3, 2012·29 cites·5 claims
- 0392US9156263B2Liquid ejection head and method of producing the sameCANON KK·Filed 2014·Granted Oct 13, 2015·8 cites·16 claims
- 0489US10308018B2Printing apparatus and method of controlling printheadCANON KK·Filed 2017·Granted Jun 4, 2019·3 cites·9 claims
- 0589US7963635B2Inkjet print headCANON KK·Filed 2008·Granted Jun 21, 2011·11 cites·6 claims
- 0688US7832843B2Liquid jet headCANON KK·Filed 2007·Granted Nov 16, 2010·10 cites·11 claims
- 0787US8231203B2Ink jet print head, ink jet printing apparatus and ink jet printing methodAKAMA YUICHIRO·Filed 2009·Granted Jul 31, 2012·13 cites·11 claims
- 0886US8985721B2Printing apparatus and aging methodCANON KK·Filed 2013·Granted Mar 24, 2015·4 cites·19 claims
- 0986US7735962B2Ink jet print headCANON KK·Filed 2008·Granted Jun 15, 2010·7 cites·11 claims
- 1086US6984026B2Ink jet record headCANON KK·Filed 2003·Granted Jan 10, 2006·26 cites·10 claims
- 1186US6971736B2Ink jet record headCANON KK·Filed 2003·Granted Dec 6, 2005·29 cites·18 claims
- 1285US7784904B2Liquid jet headCANON KK·Filed 2008·Granted Aug 31, 2010·8 cites·12 claims
- 1385US7591537B2Ink jet recording headCANON KK·Filed 2007·Granted Sep 22, 2009·8 cites·10 claims
- 1483US8287091B2Inkjet printing apparatus and inkjet printing methodKYOSHIMA MASAYUKI·Filed 2010·Granted Oct 16, 2012·6 cites·6 claims
- 1583US8177329B2Ink jet print headMATSUMOTO MITSUHIRO·Filed 2010·Granted May 15, 2012·3 cites·5 claims
- 1683US8100505B2Liquid ejecting head and manufacturing dimension control methodKURODA TOMOTSUGU·Filed 2008·Granted Jan 24, 2012·9 cites·6 claims
- 1781US7695088B2Ink jet printing apparatus and ink jet printing methodCANON KK·Filed 2007·Granted Apr 13, 2010·6 cites·8 claims
- 1879US9266325B2Print head and inkjet printing apparatusTOMIZAWA KEIJI·Filed 2012·Granted Feb 23, 2016·3 cites·16 claims
- 1979US8162446B2Print headTOMIZAWA KEIJI·Filed 2008·Granted Apr 24, 2012·6 cites·6 claims
- 2078US7938511B2Liquid ejection head, inkjet printing apparatus and liquid ejecting methodCANON KK·Filed 2008·Granted May 10, 2011·5 cites·10 claims
- 2176US7090334B2Ink jet record headCANON KK·Filed 2005·Granted Aug 15, 2006·4 cites·10 claims
- 2275US9969163B2Liquid discharge headCANON KK·Filed 2016·Granted May 15, 2018·1 cites·6 claims
- 2375US7980663B2Liquid ejection headCANON KK·Filed 2009·Granted Jul 19, 2011·4 cites·4 claims
- 2473US9889650B2Liquid ejecting head, ejecting element substrate and liquid ejecting apparatusCANON KK·Filed 2016·Granted Feb 13, 2018·1 cites·2 claims
- 2573US9731503B2Liquid discharge head and liquid discharge apparatus using the sameCANON KK·Filed 2013·Granted Aug 15, 2017·2 cites·8 claims
- 2673US8210655B2Liquid ejection head and manufacturing method of liquid ejection headMURAOKA CHIAKI·Filed 2009·Granted Jul 3, 2012·4 cites·8 claims
- 2772US8342631B2Inkjet print apparatus and inkjet print methodCANON KK·Filed 2010·Granted Jan 1, 2013·3 cites·5 claims
- 2872US8083322B2Ink-jet recording headTOMIZAWA KEIJI·Filed 2009·Granted Dec 27, 2011·3 cites·1 claims
- 2972US7556330B2Recording apparatus and recording methodCANON KK·Filed 2004·Granted Jul 7, 2009·13 cites·6 claims
- 3072US2025276528A1Liquid ejection apparatus and adjustment method for liquid ejection apparatusCANON KK·Filed 2025·Application pending·0 cites
- 3171US7771026B2Ink jet recording head and liquid jetting methodCANON KK·Filed 2007·Granted Aug 10, 2010·3 cites·9 claims
- 3267US7654648B2Liquid recording headCANON KK·Filed 2007·Granted Feb 2, 2010·2 cites·6 claims
- 3365US8845081B2Liquid discharge headOIKAWA MASAKI·Filed 2012·Granted Sep 30, 2014·1 cites·13 claims
- 3464US7963633B2Ink jet recording head and ink jet recording apparatusCANON KK·Filed 2007·Granted Jun 21, 2011·2 cites·9 claims
- 3561US7984976B2Liquid recording headCANON KK·Filed 2009·Granted Jul 26, 2011·1 cites·6 claims
- 3661US7628472B2Ink-jet recording headCANON KK·Filed 2003·Granted Dec 8, 2009·7 cites·4 claims
- 3761US6935723B2Ink jet recording headCANON KK·Filed 2003·Granted Aug 30, 2005·7 cites·6 claims
- 3859US12023924B2Liquid ejection apparatus and control methodCANON KK·Filed 2022·Granted Jul 2, 2024·0 cites·16 claims
- 3959US10322578B2Liquid ejection head and liquid ejection apparatusCANON KK·Filed 2018·Granted Jun 18, 2019·0 cites·20 claims
- 4059US8033651B2Liquid ejection head and printing apparatusCANON KK·Filed 2008·Granted Oct 11, 2011·1 cites·6 claims
- 4159USRE40994EInk jet recording headCANON KK·Filed 2006·Granted Nov 24, 2009·1 cites·6 claims
- 4258US12053979B2Liquid ejection apparatus and control methodCANON KK·Filed 2022·Granted Aug 6, 2024·0 cites·16 claims
- 4358US2025115046A1Liquid ejection apparatusCANON KK·Filed 2024·Application pending·0 cites
- 4458US2024351337A1Liquid ejection apparatus and method of controlling the sameCANON KK·Filed 2024·Application pending·0 cites
- 4557US2025091345A1Liquid ejection head, and manufacturing method for liquid ejection headCANON KK·Filed 2024·Application pending·0 cites
- 4654US2025042153A1Liquid ejection head and method for ejecting liquidCANON KK·Filed 2024·Application pending·0 cites
- 4752US9044944B2Liquid discharge head and method of making the sameCANON KK·Filed 2014·Granted Jun 2, 2015·0 cites·3 claims
- 4851US2024157705A1Liquid ejection headCANON KK·Filed 2023·Application pending·0 cites
- 4950US10300698B2Liquid ejection headCANON KK·Filed 2018·Granted May 28, 2019·0 cites·20 claims
- 5049US12145359B2Liquid ejection apparatus and control methodCANON KK·Filed 2022·Granted Nov 19, 2024·0 cites·10 claims
Showing the top 50 of 63 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →