Inventor · disambiguated record
Masaru Kumagai
Also filed as: KUMAGAI MASARU
36 granted patents·18 pending applications·115 citations·filing 1994–2025
95Inventor score
Top patents by PatentIndex Score
54 records- 0191US9555637B2Cartridge and liquid supplying methodSEIKO EPSON CORP·Filed 2016·Granted Jan 31, 2017·4 cites·7 claims
- 0286US10717295B2Liquid ejecting apparatus, liquid filling method, and air bubble discharging methodSEIKO EPSON CORP·Filed 2019·Granted Jul 21, 2020·2 cites·13 claims
- 0384US10569559B2Liquid ejecting apparatusSEIKO EPSON CORP·Filed 2017·Granted Feb 25, 2020·2 cites·10 claims
- 0483US9616671B2CartridgeSEIKO EPSON CORP·Filed 2016·Granted Apr 11, 2017·2 cites·16 claims
- 0583US9424982B2TransformerTDK CORP·Filed 2014·Granted Aug 23, 2016·4 cites·7 claims
- 0683US8430497B2Ink jet recording methodOKADA HIDEKI·Filed 2011·Granted Apr 30, 2013·3 cites·2 claims
- 0780US8133314B2Ink composition, recording method using the same, and recorded matterISHIHARA DAISUKE·Filed 2010·Granted Mar 13, 2012·8 cites·8 claims
- 0871US8777393B2Ink jet recording methodSEIKO EPSON CORP·Filed 2013·Granted Jul 15, 2014·1 cites·11 claims
- 0968US2024428969A1Coil deviceTDK CORP·Filed 2024·Application pending·0 cites
- 1067US11981152B2Three-dimensional object printing apparatusSEIKO EPSON CORP·Filed 2022·Granted May 14, 2024·0 cites·11 claims
- 1167US8807677B2Printing apparatus and printing methodSEIKO EPSON CORP·Filed 2012·Granted Aug 19, 2014·1 cites·9 claims
- 1266US12296586B2Printing deviceSEIKO EPSON CORP·Filed 2023·Granted May 13, 2025·0 cites·14 claims
- 1366US12002616B2Coil deviceTDK CORP·Filed 2020·Granted Jun 4, 2024·0 cites·18 claims
- 1466US11932035B2Three-dimensional object printing apparatusSEIKO EPSON CORP·Filed 2022·Granted Mar 19, 2024·0 cites·18 claims
- 1566US5500510AMethod of automatically controlling the fusion process between thermoplastic articlesTOA KOKYU TUGITEVARUBU SEIZO C·Filed 1994·Granted Mar 19, 1996·26 cites·5 claims
- 1666US2024120147A1Flat coil and coil deviceTDK CORP·Filed 2023·Application pending·0 cites
- 1765US12325238B2Printing apparatusSEIKO EPSON CORP·Filed 2023·Granted Jun 10, 2025·0 cites·9 claims
- 1865US9116464B2Developing device and image forming apparatusKOMATSU MAKOTO·Filed 2013·Granted Aug 25, 2015·1 cites·15 claims
- 1965US2025144887A1Three-Dimensional Object Printing System, Control Method Of Three-Dimensional Object Printing System, And Three-Dimensional Object Printing ApparatusSEIKO EPSON CORP·Filed 2024·Application pending·0 cites
- 2065US2025282095A1Three-Dimensional Object Printing Apparatus And Printing MethodSEIKO EPSON CORP·Filed 2025·Application pending·0 cites
- 2164US2024006117A1Coil deviceTDK CORP·Filed 2023·Application pending·0 cites
- 2263US2024269933A1Three-Dimensional Object Printing Apparatus And Three-Dimensional Object Printing MethodSEIKO EPSON CORP·Filed 2024·Application pending·0 cites
- 2363US2024286350A1Printing apparatus and printing methodSEIKO EPSON CORP·Filed 2024·Application pending·0 cites
- 2462US12179502B2Three-dimensional printing deviceSEIKO EPSON CORP·Filed 2022·Granted Dec 31, 2024·0 cites·13 claims
- 2562US9451116B2Image forming apparatus having a density sensor movable in a main scanning directionMORI ATSUSHI·Filed 2014·Granted Sep 20, 2016·0 cites·18 claims
- 2662US2024096547A1Coil deviceTDK CORP·Filed 2023·Application pending·0 cites
- 2761US7573364B2Coil unitTDK CORP·Filed 2007·Granted Aug 11, 2009·2 cites·4 claims
- 2861US2025271260A1Measuring apparatus and measuring methodMASUDA KOJI·Filed 2025·Application pending·0 cites
- 2961US2025162258A1Three-Dimensional Object Printing ApparatusSEIKO EPSON CORP·Filed 2024·Application pending·0 cites
- 3060US12257774B2Three-dimensional object printing apparatus and three-dimensional object printing methodSEIKO EPSON CORP·Filed 2021·Granted Mar 25, 2025·0 cites·15 claims
- 3160US11945163B2Three-dimensional object printing apparatus and three-dimensional object printing methodSEIKO EPSON CORP·Filed 2021·Granted Apr 2, 2024·0 cites·19 claims
- 3260US2023290562A1Coil deviceTDK CORP·Filed 2023·Application pending·0 cites
- 3360US2023290560A1Coil deviceTDK CORP·Filed 2023·Application pending·0 cites
- 3459US12447755B2Three-dimensional object printing apparatus and three-dimensional object printing methodSEIKO EPSON CORP·Filed 2024·Granted Oct 21, 2025·0 cites·12 claims
- 3559US10361025B2Transformer and leakage transformerTDK CORP·Filed 2016·Granted Jul 23, 2019·0 cites·10 claims
- 3657US11826947B23D object print apparatus and methodSEIKO EPSON CORP·Filed 2021·Granted Nov 28, 2023·0 cites·11 claims
- 3757US9193151B2Ink jet recording methodSEIKO EPSON CORP·Filed 2013·Granted Nov 24, 2015·0 cites·3 claims
- 3857US2024246336A1Printing apparatus and printing methodSEIKO EPSON CORP·Filed 2024·Application pending·0 cites
- 3956US2022319768A1Coil deviceTDK CORP·Filed 2022·Application pending·0 cites
- 4054US10214024B2Liquid ejecting apparatusSEIKO EPSON CORP·Filed 2017·Granted Feb 26, 2019·0 cites·20 claims
- 4153US10661574B2Liquid ejecting apparatusesSEIKO EPSON CORP·Filed 2019·Granted May 26, 2020·0 cites·13 claims
- 4253US2023286291A1Three-dimensional object printing device and control deviceSEIKO EPSON CORP·Filed 2023·Application pending·0 cites
- 4352US5789359ADetergent, method of cleaning, and apparatus for cleaningTOSHIBA SILICONE·Filed 1994·Granted Aug 4, 1998·25 cites·25 claims
- 4451US9921533B2Image forming apparatus having a density sensor movable in a main scanning directionMORI ATSUSHI·Filed 2016·Granted Mar 20, 2018·0 cites·15 claims
- 4551US8449098B2Ink jet recording methodOKADA HIDEKI·Filed 2011·Granted May 28, 2013·0 cites·3 claims
- 4650US5743989AMethod of welding plastics sheets together and a joint used thereinTOA KOKYU TUGITEVARUBU SEIZO C·Filed 1995·Granted Apr 28, 1998·17 cites·3 claims
- 4749US8249780B2Seat control deviceFUJIWARA HIROYUKI·Filed 2009·Granted Aug 21, 2012·2 cites·6 claims
- 4848US2022193997A1Three-Dimensional Object Printing Apparatus And Three-Dimensional Object Printing MethodSEIKO EPSON CORP·Filed 2021·Application pending·0 cites
- 4948US2022266521A1Three-Dimensional Object Printing ApparatusSEIKO EPSON CORP·Filed 2022·Application pending·0 cites
- 5046US11694585B2Display apparatus, display system, display control method, and non-transitory recording mediumKUMAGAI MASARU·Filed 2021·Granted Jul 4, 2023·0 cites·20 claims
Showing the top 50 of 54 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →