Inventor · disambiguated record
Eiju Hirai
Also filed as: HIRAI EIJU
126 granted patents·18 pending applications·144 citations·filing 2005–2023
99Inventor score
Top patents by PatentIndex Score
144 records- 0197US12427770B2Liquid ejecting head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2023·Granted Sep 30, 2025·2 cites·15 claims
- 0294US9144977B2Liquid ejection head and liquid ejection apparatusSEIKO EPSON CORP·Filed 2014·Granted Sep 29, 2015·5 cites·4 claims
- 0394US9132637B2Liquid ejecting head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2015·Granted Sep 15, 2015·5 cites·7 claims
- 0493US9573371B2Head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2016·Granted Feb 21, 2017·5 cites·10 claims
- 0593US8262203B2Liquid ejecting head and liquid ejecting apparatusHIRAI EIJU·Filed 2011·Granted Sep 11, 2012·8 cites·14 claims
- 0692US8057018B2Method of manufacturing a liquid jet head and a liquid jet apparatusYAZAKI SHIRO·Filed 2009·Granted Nov 15, 2011·12 cites·5 claims
- 0791US10894408B2Liquid discharging head and liquid discharging apparatusSEIKO EPSON CORP·Filed 2019·Granted Jan 19, 2021·3 cites·20 claims
- 0891US10059101B2Liquid ejection head and liquid ejection apparatusSEIKO EPSON CORP·Filed 2016·Granted Aug 28, 2018·2 cites·18 claims
- 0991US7350904B2Piezoelectric element, piezoelectric actuator, ink jet recording head, ink jet printer, surface acoustic wave element, frequency filter, oscillator, electronic circuit, thin film piezoelectric resonator, and electronic apparatusSEIKO EPSON CORP·Filed 2005·Granted Apr 1, 2008·20 cites·10 claims
- 1090US9498952B2Liquid ejection head and liquid ejection apparatusSEIKO EPSON CORP·Filed 2015·Granted Nov 22, 2016·2 cites·8 claims
- 1190US8459783B2Liquid ejecting head and liquid ejecting apparatusHIRAI EIJU·Filed 2011·Granted Jun 11, 2013·6 cites·14 claims
- 1290US8360558B2Liquid droplet discharging head and liquid droplet discharging apparatusSEIKO EPSON CORP·Filed 2010·Granted Jan 29, 2013·6 cites·9 claims
- 1389US9770907B2MEMS device, liquid ejecting head, and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2016·Granted Sep 26, 2017·3 cites·6 claims
- 1489US8506057B2Liquid droplet ejecting head and liquid droplet ejecting apparatusHIRAI EIJU·Filed 2010·Granted Aug 13, 2013·6 cites·6 claims
- 1588US9662882B2Liquid ejecting head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2016·Granted May 30, 2017·2 cites·30 claims
- 1688US9272515B2Liquid ejecting head, liquid ejecting apparatus, piezoelectric element, ultrasonic transducer, and ultrasonic deviceSEIKO EPSON CORP·Filed 2014·Granted Mar 1, 2016·4 cites·20 claims
- 1788US8752938B2Liquid ejecting head and liquid ejecting apparatusMIYAZAWA HIROMU·Filed 2010·Granted Jun 17, 2014·4 cites·14 claims
- 1887US9705066B2Head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2016·Granted Jul 11, 2017·6 cites·8 claims
- 1986US10625503B2Liquid ejection head, liquid ejection apparatus, and electronic deviceSEIKO EPSON CORP·Filed 2019·Granted Apr 21, 2020·2 cites·20 claims
- 2084US8727510B2Liquid ejection head and liquid ejection apparatusSEIKO EPSON CORP·Filed 2013·Granted May 20, 2014·2 cites·6 claims
- 2183US9914300B2Head and liquid ejecting apparatus with electrically connecting bumpsSEIKO EPSON CORP·Filed 2016·Granted Mar 13, 2018·2 cites·10 claims
- 2281US9308727B2Liquid ejecting head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2015·Granted Apr 12, 2016·2 cites·8 claims
- 2380US7766464B2Piezoelectric element, piezoelectric actuator, ink jet recording head, ink jet printer, surface acoustic wave element, frequency filter, oscillator, electronic circuit, thin film piezoelectric resonator, and electronic apparatusSEIKO EPSON CORP·Filed 2008·Granted Aug 3, 2010·8 cites·4 claims
- 2478US10611151B2Liquid ejecting head, liquid ejecting apparatus, and piezoelectric deviceSEIKO EPSON CORP·Filed 2018·Granted Apr 7, 2020·1 cites·19 claims
- 2578US10525707B2Liquid ejecting head, liquid ejecting apparatus, and piezoelectric deviceSEIKO EPSON CORP·Filed 2018·Granted Jan 7, 2020·1 cites·11 claims
- 2678US10500853B2Piezoelectric device, liquid ejecting head, and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2018·Granted Dec 10, 2019·1 cites·20 claims
- 2778US9969162B2MEMS device, liquid ejecting head, and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2017·Granted May 15, 2018·1 cites·12 claims
- 2878US9751307B2Piezoelectric device, liquid ejection head, and liquid ejection apparatusSEIKO EPSON CORP·Filed 2016·Granted Sep 5, 2017·1 cites·19 claims
- 2978US9340019B2Liquid ejecting head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2015·Granted May 17, 2016·2 cites·4 claims
- 3076US12370791B2Liquid discharge device and systemSEIKO EPSON CORP·Filed 2023·Granted Jul 29, 2025·0 cites·15 claims
- 3176US9914301B2Piezoelectric device, liquid ejecting head, and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2017·Granted Mar 13, 2018·1 cites·20 claims
- 3275US10000061B2Piezoelectric device, liquid ejecting head, and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2016·Granted Jun 19, 2018·2 cites·21 claims
- 3374US12420550B2Liquid ejecting head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2023·Granted Sep 23, 2025·0 cites·16 claims
- 3474US8721055B2Liquid-ejecting head, liquid-ejecting apparatus, and piezoelectric deviceSHIMIZU TOSHIHIRO·Filed 2011·Granted May 13, 2014·2 cites·12 claims
- 3573US10150294B2Inkjet head and inkjet printerSEIKO EPSON CORP·Filed 2016·Granted Dec 11, 2018·1 cites·6 claims
- 3672US9434162B2Liquid ejecting head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2014·Granted Sep 6, 2016·1 cites·16 claims
- 3772US9375921B2Piezoelectric element, liquid ejecting head, and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2015·Granted Jun 28, 2016·1 cites·3 claims
- 3872US9272507B2Liquid ejecting head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2014·Granted Mar 1, 2016·1 cites·12 claims
- 3972US7907156B2Display device and electronic paperSEIKO EPSON CORP·Filed 2008·Granted Mar 15, 2011·2 cites·7 claims
- 4071US7616375B2Display device, method for manufacturing display device, and electronic paperSEIKO EPSON CORP·Filed 2008·Granted Nov 10, 2009·5 cites·11 claims
- 4169US9139000B2Liquid ejecting head and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2014·Granted Sep 22, 2015·1 cites·8 claims
- 4268US12103304B2Liquid discharge head and liquid discharge deviceSEIKO EPSON CORP·Filed 2022·Granted Oct 1, 2024·0 cites·13 claims
- 4368US10857785B2Liquid ejecting head, liquid ejecting unit, liquid ejecting apparatus, and piezoelectric deviceSEIKO EPSON CORP·Filed 2019·Granted Dec 8, 2020·0 cites·11 claims
- 4467US8914955B2Method for manufacturing piezoelectric element and method for manufacturing liquid ejection headHIRAI EIJU·Filed 2011·Granted Dec 23, 2014·1 cites·10 claims
- 4566US12358285B2Liquid discharge head and liquid discharge deviceSEIKO EPSON CORP·Filed 2023·Granted Jul 15, 2025·0 cites·17 claims
- 4665US12296589B2Liquid discharge head and liquid discharge deviceSEIKO EPSON CORP·Filed 2022·Granted May 13, 2025·0 cites·16 claims
- 4765US10449764B2MEMS device, liquid ejecting head, liquid ejecting apparatus, manufacturing method of MEMS device, and manufacturing method of liquid ejecting headSEIKO EPSON CORP·Filed 2018·Granted Oct 22, 2019·0 cites·4 claims
- 4864US10029459B2Piezoelectric device, liquid ejecting head, and liquid ejecting apparatusSEIKO EPSON CORP·Filed 2017·Granted Jul 24, 2018·0 cites·6 claims
- 4964US8313177B2Actuator, liquid droplet ejecting head, and manufacturing method thereof, and liquid droplet ejecting apparatusHIRAI EIJU·Filed 2011·Granted Nov 20, 2012·2 cites·20 claims
- 5063US9962935B2Piezoelectric device, liquid ejection head, and liquid ejection apparatusSEIKO EPSON CORP·Filed 2017·Granted May 8, 2018·0 cites·4 claims
Showing the top 50 of 144 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →