Inventor · disambiguated record
Tomomasa Nishikawa
Also filed as: NISHIKAWA TOMOMASA
79 granted patents·41 pending applications·2,676 citations·filing 2002–2023
99Inventor score
Top patents by PatentIndex Score
120 records- 0198US9314908B2Impact toolTANIMOTO HIDEYUKI·Filed 2010·Granted Apr 19, 2016·1.1k cites·5 claims
- 0298US7330006B2Power toolHITACHI KOKI KK·Filed 2006·Granted Feb 12, 2008·56 cites·11 claims
- 0398US6886730B2Combustion-powered driving toolHITACHI KOKI KK·Filed 2004·Granted May 3, 2005·904 cites·14 claims
- 0496US9833890B2Electric tool and communication plug for electric toolITO TATSUYA·Filed 2012·Granted Dec 5, 2017·21 cites·15 claims
- 0594US10286462B2Cutting machineHITACHI KOKI KK·Filed 2016·Granted May 14, 2019·5 cites·18 claims
- 0694US9940813B2Abnormality reporting system and electric tool, and communication terminalHITACHI KOKI KK·Filed 2015·Granted Apr 10, 2018·9 cites·18 claims
- 0794US7909114B2Drilling deviceHITACHI KOKI KK·Filed 2008·Granted Mar 22, 2011·36 cites·11 claims
- 0893US9950417B2Power toolITO YUTAKA·Filed 2011·Granted Apr 24, 2018·31 cites·4 claims
- 0993US9616558B2Impact toolNISHIKAWA TOMOMASA·Filed 2010·Granted Apr 11, 2017·19 cites·7 claims
- 1093US8342782B2Drilling tool with dust collectorHITACHI KOKI KK·Filed 2008·Granted Jan 1, 2013·26 cites·18 claims
- 1192US11205820B2Battery pack, electrical device using battery pack, and electrical device systemKOKI HOLDINGS CO LTD·Filed 2017·Granted Dec 21, 2021·12 cites·24 claims
- 1292US10442066B2DriverHITACHI KOKI KK·Filed 2015·Granted Oct 15, 2019·13 cites·7 claims
- 1391US10263228B2Electric device including sealing member between attachment part and battery packHITACHI KOKI KK·Filed 2013·Granted Apr 16, 2019·7 cites·7 claims
- 1491US7969116B2Power pack and cordless power tool having the sameHITACHI KOKI KK·Filed 2006·Granted Jun 28, 2011·37 cites·41 claims
- 1590US10661427B2Power toolKOKI HOLDINGS CO LTD·Filed 2017·Granted May 26, 2020·4 cites·14 claims
- 1690US7063052B2Combustion type power tool having fin in low turbulent combustion region within combustion chamberHITACHI KOKI KK·Filed 2005·Granted Jun 20, 2006·28 cites·11 claims
- 1789US9970445B2Portable blowerHITACHI KOKI KK·Filed 2013·Granted May 15, 2018·9 cites·14 claims
- 1889US7103979B2Portable electric cutting device with blower mechanismHITACHI KOKI KK·Filed 2003·Granted Sep 12, 2006·39 cites·38 claims
- 1988US9048699B2Power toolOOMORI KATSUHIRO·Filed 2009·Granted Jun 2, 2015·27 cites·11 claims
- 2088US8925645B2Oil pulse toolHARADA TETSUHIRO·Filed 2009·Granted Jan 6, 2015·23 cites·5 claims
- 2187US12074296B2Battery pack, electric apparatus using battery pack, and electric apparatus main bodyKOKI HOLDINGS CO LTD·Filed 2023·Granted Aug 27, 2024·0 cites·21 claims
- 2287US10836019B2Work machineHITACHI KOKI KK·Filed 2016·Granted Nov 17, 2020·6 cites·10 claims
- 2387US8338997B2Power toolNISHIKAWA TOMOMASA·Filed 2009·Granted Dec 25, 2012·19 cites·12 claims
- 2485US9101993B2Portable cutterYOKOTA TOMOYOSHI·Filed 2008·Granted Aug 11, 2015·14 cites·7 claims
- 2583US11167403B2Electric working machineHITACHI KOKI KK·Filed 2015·Granted Nov 9, 2021·2 cites·5 claims
- 2683US10994393B2Rotary impact toolKOKI HOLDINGS CO LTD·Filed 2017·Granted May 4, 2021·3 cites·9 claims
- 2782US12046721B2Battery pack and electric apparatus using battery packKOKI HOLDINGS CO LTD·Filed 2022·Granted Jul 23, 2024·0 cites·22 claims
- 2882US11824169B2Battery pack, electrical device using battery pack, and electrical device systemKOKI HOLDINGS CO LTD·Filed 2017·Granted Nov 21, 2023·1 cites·19 claims
- 2982US9869327B2Portable blowerHITACHI KOKI KK·Filed 2013·Granted Jan 16, 2018·10 cites·5 claims
- 3082US8640789B2Oil pulse toolHARADA TETSUHIRO·Filed 2009·Granted Feb 4, 2014·18 cites·7 claims
- 3182US2024055674A1Battery pack, electric device using battery pack, and electric device systemKOKI HOLDINGS CO LTD·Filed 2023·Application pending·0 cites
- 3280US9522461B2Impact toolOOMORI KATSUHIRO·Filed 2011·Granted Dec 20, 2016·7 cites·18 claims
- 3380US7467739B2Combustion-powered, fastener-driving tool generating sparks in succession when triggeredHITACHI KOKI KK·Filed 2005·Granted Dec 23, 2008·11 cites·14 claims
- 3479US11837741B2Electrical apparatus using battery packKOKI HOLDINGS CO LTD·Filed 2018·Granted Dec 5, 2023·1 cites·14 claims
- 3579US8529169B2Drilling tool with dust collectorNISHIKAWA TOMOMASA·Filed 2008·Granted Sep 10, 2013·9 cites·13 claims
- 3679US7063053B2Combustion type power tool having fin for effectively cooling cylinderHITACHI KOKI KK·Filed 2005·Granted Jun 20, 2006·15 cites·8 claims
- 3778US9473055B2Electric working machineHITACHI KOKI KK·Filed 2013·Granted Oct 18, 2016·2 cites·2 claims
- 3877US7225768B2Combustion type power tool having buffer pieceHITACHI KOKI KK·Filed 2005·Granted Jun 5, 2007·8 cites·21 claims
- 3977US6597572B2DC power source unit with battery recharging functionHITACHI KOKI KK·Filed 2002·Granted Jul 22, 2003·37 cites·8 claims
- 4075US11745272B2Electrical device system, electrical device, and power supply deviceKOKI HOLDINGS CO LTD·Filed 2018·Granted Sep 5, 2023·1 cites·8 claims
- 4175US7171997B2Portable electric router having radial fanHITACHI KOKI KK·Filed 2004·Granted Feb 6, 2007·17 cites·20 claims
- 4274US8205777B2Fuel, gas, combustion type power tool driven by the fuel gas, and compressed gas container for the combustion type power toolNISHIKAWA TOMOMASA·Filed 2005·Granted Jun 26, 2012·13 cites·14 claims
- 4374US7540722B2BlowerHITACHI KOKI KK·Filed 2005·Granted Jun 2, 2009·5 cites·8 claims
- 4474US2022048176A1Electric working machineKOKI HOLDINGS CO LTD·Filed 2021·Application pending·0 cites
- 4573US12125994B2Electrical apparatus using battery packKOKI HOLDINGS CO LTD·Filed 2023·Granted Oct 22, 2024·0 cites·8 claims
- 4672US11367907B2Battery pack and electric apparatus using battery packKOKI HOLDINGS CO LTD·Filed 2018·Granted Jun 21, 2022·0 cites·16 claims
- 4770US11710860B2Battery pack and electrical apparatus using battery packKOKI HOLDINGS CO LTD·Filed 2018·Granted Jul 25, 2023·1 cites·20 claims
- 4870US10888938B2Cutting machineKOKI HOLDINGS CO LTD·Filed 2019·Granted Jan 12, 2021·0 cites·18 claims
- 4970US7121442B2Combustion-type power toolHITACHI KOKI KK·Filed 2005·Granted Oct 17, 2006·9 cites·12 claims
- 5068US7743955B2Combustion type power tool having fanHITACHI KOKI KK·Filed 2005·Granted Jun 29, 2010·10 cites·5 claims
Showing the top 50 of 120 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →