Inventor · disambiguated record
Hitoshi Hayakawa
Also filed as: HAYAKAWA HITOSHI
45 granted patents·11 pending applications·1,038 citations·filing 1988–2024
98Inventor score
Files withSEIKO EPSON CORP31DAINIPPON INK & CHEMICALS5HITACHI ASTEMO LTD5DAIDO STEEL CO LTD4HITACHI LTD3
Top patents by PatentIndex Score
56 records- 0196US6337459B1Multi-layered anti-coking heat resisting metal tube and the method for manufacturing thereofDAIDO STEEL CO LTD·Filed 2000·Granted Jan 8, 2002·67 cites·21 claims
- 0294US6786581B1Ink-jet printing apparatus and ink cartridgeSEIKO EPSON CORP·Filed 1999·Granted Sep 7, 2004·80 cites·44 claims
- 0393US6709088B2Inkjet recording apparatusSEIKO EPSON CORP·Filed 2001·Granted Mar 23, 2004·43 cites·16 claims
- 0491US7121652B2Ink jet recording apparatus and cleaning control method for recording head incorporated thereinSEIKO EPSON CORP·Filed 2000·Granted Oct 17, 2006·33 cites·80 claims
- 0591US6846062B2Ink jet recording apparatus and cleaning control method for recording head incorporated thereinSEIKO EPSON CORP·Filed 2002·Granted Jan 25, 2005·32 cites·3 claims
- 0691US6705712B2Ink cartridge, ink jet recording device using the same, and method for controlling the cleaning of a recording head of the ink jet recording deviceSEIKO EPSON CORP·Filed 2001·Granted Mar 16, 2004·45 cites·25 claims
- 0791US6481826B1Ink jet recording apparatus, method of discharging ink from capping unit incorporated in the apparatus, and ink composition used with the apparatusSEIKO EPSON CORP·Filed 2000·Granted Nov 19, 2002·42 cites·15 claims
- 0891US6036299AInk-jet recording apparatusSEIKO EPSON CORP·Filed 1997·Granted Mar 14, 2000·69 cites·27 claims
- 0991US4902359AWear-resistant titanium or titanium-alloy member and a method for manufacturing the sameDAIDO STEEL CO LTD·Filed 1988·Granted Feb 20, 1990·74 cites·15 claims
- 1090US6338539B1Ink jet recording deviceSEIKO EPSON CORP·Filed 1997·Granted Jan 15, 2002·76 cites·38 claims
- 1188US5855699AMethod for manufacturing welded clad steel tubeDAIDO STEEL CO LTD·Filed 1997·Granted Jan 5, 1999·45 cites·8 claims
- 1286US6578949B2Ink jet recording device and method of driving and controlling the sameSEIKO EPSON CORP·Filed 2001·Granted Jun 17, 2003·36 cites·19 claims
- 1386US5260724ACapping device for ink jet printerSEIKO EPSON CORP·Filed 1991·Granted Nov 9, 1993·55 cites·13 claims
- 1485US7449223B2Polymerizable liquid crystal composition and optically anisotropic mediumDAINIPPON INK & CHEMICALS·Filed 2005·Granted Nov 11, 2008·14 cites·15 claims
- 1585US6886927B2Ink-jet printing apparatus and ink cartridgeSEIKO EPSON CORP·Filed 2002·Granted May 3, 2005·20 cites·8 claims
- 1682US7524019B2Method for cleaning liquid ejection apparatus and liquid ejection apparatusSEIKO EPSON CORP·Filed 2006·Granted Apr 28, 2009·6 cites·17 claims
- 1782US6417488B1Internal metal pipe welding apparatus and monitoring systemDAIDO STEEL CO LTD·Filed 2000·Granted Jul 9, 2002·27 cites·23 claims
- 1881US9896603B2Curing accelerator for oxidative polymerization-type unsaturated resin, printing ink, and coating materialDAINIPPON INK & CHEMICALS·Filed 2014·Granted Feb 20, 2018·2 cites·23 claims
- 1979US5382969AInk-expelling restoring device and method for ink jet printerSEIKO EPSON CORP·Filed 1992·Granted Jan 17, 1995·38 cites·9 claims
- 2077US6481824B1Ink jet recording apparatus and recording head cleaning control method thereonSEIKO EPSON CORP·Filed 1999·Granted Nov 19, 2002·31 cites·12 claims
- 2176US6305778B1Ink-jet recording apparatusSEIKO EPSON CORP·Filed 1999·Granted Oct 23, 2001·29 cites·36 claims
- 2275US6422680B1Ink jet recording apparatus and cleaning control method for the sameSEIKO EPSON CORP·Filed 2000·Granted Jul 23, 2002·16 cites·22 claims
- 2375US6227661B1Ink-jet printerSEIKO EPSON CORP·Filed 1998·Granted May 8, 2001·31 cites·29 claims
- 2470US7195345B2Ink-jet printing apparatus and ink cartridgeSEIKO EPSON CORP·Filed 2004·Granted Mar 27, 2007·9 cites·12 claims
- 2570US6733958B2Material for photo-alignment layer, photo-alignment layer and method of manufacturing the sameDAINIPPON INK & CHEMICALS·Filed 2001·Granted May 11, 2004·14 cites·9 claims
- 2669US9025443B2Network equipment and frame transmission control methodHAYAKAWA HITOSHI·Filed 2012·Granted May 5, 2015·3 cites·12 claims
- 2769US7244013B2Liquid ejecting apparatusSEIKO EPSON CORP·Filed 2004·Granted Jul 17, 2007·10 cites·20 claims
- 2867US6991314B2Ink-jet recording apparatusSEIKO EPSON CORP·Filed 2003·Granted Jan 31, 2006·9 cites·13 claims
- 2967US6637857B2Ink jet recording apparatus and cleaning control method for wiping device in the apparatusSEIKO EPSON CORP·Filed 2001·Granted Oct 28, 2003·11 cites·27 claims
- 3065US7674866B2Method of producing polymer using iron complex as catalystUNIV KYUSHU NAT UNIV CORP·Filed 2006·Granted Mar 9, 2010·2 cites·12 claims
- 3162US9081612B2Virtual machine control method and virtual machineHITACHI LTD·Filed 2013·Granted Jul 14, 2015·1 cites·12 claims
- 3261US7543907B2Ink jet recording apparatus and cleaning control method for recording head incorporated thereinSEIKO EPSON CORP·Filed 2006·Granted Jun 9, 2009·1 cites·7 claims
- 3360US6595616B2Ink jet type recording apparatusSEIKO EPSON CORP·Filed 2001·Granted Jul 22, 2003·8 cites·13 claims
- 3460US6406123B1Capping unit for ink jet recording head incorporated in ink jet recording apparatus and method of manufacturing the sameSEIKO EPSON CORP·Filed 1999·Granted Jun 18, 2002·18 cites·33 claims
- 3558US2025267190A1Storage systemHITACHI VANTARA LTD·Filed 2024·Application pending·0 cites
- 3658US2025267199A1Storage systemHITACHI VANTARA LTD·Filed 2024·Application pending·0 cites
- 3754US2025061724A1Target calculation method and computing deviceHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 3851US2024282123A1Rearward white line inference device, target recognition device, and methodHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 3950US6568788B2Ink jet recording apparatusSEIKO EPSON CORP·Filed 2001·Granted May 27, 2003·4 cites·11 claims
- 4049US7641305B2Liquid ejecting apparatusSEIKO EPSON CORP·Filed 2007·Granted Jan 5, 2010·0 cites·3 claims
- 4149US6260944B1Ink jet type recording apparatus and recording head cleaning methodSEIKO EPSON CORP·Filed 1997·Granted Jul 17, 2001·11 cites·7 claims
- 4248US5907336AInk jet recording apparatus with ink discharge hole in nonprint regionSEIKO EPSON CORP·Filed 1996·Granted May 25, 1999·10 cites·2 claims
- 4346US8017706B2Process for production of polymers with iron complex catalystDAINIPPON INK & CHEMICALS·Filed 2008·Granted Sep 13, 2011·0 cites·12 claims
- 4446US2022254170A1Sensor Information Processing DeviceHITACHI ASTEMO LTD·Filed 2020·Application pending·0 cites
- 4545US2025128738A1Travel assistance device and travel assistance methodHITACHI ASTEMO LTD·Filed 2022·Application pending·0 cites
- 4645US2024005673A1Dividing line recognition deviceHITACHI ASTEMO LTD·Filed 2021·Application pending·0 cites
- 4744US2013262664A1Computer system and subsystem management methodHITACHI LTD·Filed 2012·Application pending·0 cites
- 4843US2008198186A1Liquid ejecting apparatus and programSEIKO EPSON CORP·Filed 2008·Application pending·0 cites
- 4941US7141642B2Process for producing polymerizable polybranched polyesterDAINIPPON INK & CHEMICALS·Filed 2003·Granted Nov 28, 2006·0 cites·13 claims
- 5041US6966624B2Liquid spraying deviceSEIKO EPSON CORP·Filed 2002·Granted Nov 22, 2005·2 cites·7 claims
Showing the top 50 of 56 patent records by PatentIndex Score.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →