Inventor · disambiguated record
Keishi Matsumoto
Also filed as: MATSUMOTO KEISHI
22 granted patents·11 pending applications·325 citations·filing 2002–2022
94Inventor score
Files withYAMAHA CORP12NIPPON STEEL CORP5NIPPON STEEL & SUMITOMO METAL CORP2SHIMODA KAZUHIRO2SUMITOMO METAL IND2
Top patents by PatentIndex Score
33 records- 0195US8411883B2Loudspeaker apparatus and speaker systemMATSUMOTO KEISHI·Filed 2009·Granted Apr 2, 2013·144 cites·8 claims
- 0294US6659509B2Threaded joint for steel pipesSUMITOMO METAL IND·Filed 2003·Granted Dec 9, 2003·61 cites·13 claims
- 0391US8815347B2Antioxidant agent and process for producing metallic materialSHIMODA KAZUHIRO·Filed 2011·Granted Aug 26, 2014·6 cites·5 claims
- 0489US9321982B2Threaded joint for pipesGOTO KUNIO·Filed 2010·Granted Apr 26, 2016·8 cites·10 claims
- 0588US7360798B2Threaded joint for steel pipesSUMITOMO METAL IND·Filed 2004·Granted Apr 22, 2008·30 cites·9 claims
- 0686US6975572B2Optical disc apparatus with regulation of recording velocity and laser powerYAMAHA CORP·Filed 2002·Granted Dec 13, 2005·22 cites·20 claims
- 0784US7046600B2Optical disc apparatus with laser power control matching linear recording velocityYAMAHA CORP·Filed 2002·Granted May 16, 2006·19 cites·22 claims
- 0883US9277600B2Stator coil heating apparatus and stator coil heating methodTOYOTA MOTOR CO LTD·Filed 2013·Granted Mar 1, 2016·5 cites·12 claims
- 0981US7200080B2Optical disk recorder with reproduction quality controlYAMAHA CORP·Filed 2003·Granted Apr 3, 2007·10 cites·10 claims
- 1072US8327676B2Upper-end formed glass complex for hot expanding piercing and method of manufacturing billet for hot extrusion pipe makingNISHIMORI JUNICHI·Filed 2011·Granted Dec 11, 2012·5 cites·6 claims
- 1168US8586644B2Photocurable composition suitable for rust prevention of a threaded joint for steel pipesNAGAREO TOMOMITSU·Filed 2011·Granted Nov 19, 2013·5 cites·13 claims
- 1266US7046599B2Optical disc recording method and optical disc recording apparatus for setting optimal recording power to record dataYAMAHA CORP·Filed 2003·Granted May 16, 2006·6 cites·8 claims
- 1362US2024418301A1Oil-well metal pipeNIPPON STEEL CORP·Filed 2022·Application pending·0 cites
- 1460US7272089B2Optical disc recording under adjustable conditionsYAMAHA CORP·Filed 2002·Granted Sep 18, 2007·4 cites·6 claims
- 1558US2006153028A1Optical disk recorder with reproduction quality controlYAMAHA CORP·Filed 2006·Application pending·0 cites
- 1658US2006153029A1Optical disk recorder with reproduction quality controlYAMAHA CORP·Filed 2006·Application pending·0 cites
- 1758US2006153030A1Optical disk recorder with reproduction quality controlYAMAHA CORP·Filed 2006·Application pending·0 cites
- 1858US2006171278A1Optical disk recorder with reproduction quality controlYAMAHA CORP·Filed 2006·Application pending·0 cites
- 1957US10626345B2Threaded joint for pipesNIPPON STEEL & SUMITOMO METAL CORP·Filed 2015·Granted Apr 21, 2020·0 cites·16 claims
- 2055US11879172B2Method for producing chemically treated alloy material, and chemical treatment solution regeneration apparatus used in method for producing chemically treated alloy materialNIPPON STEEL CORP·Filed 2018·Granted Jan 23, 2024·0 cites·18 claims
- 2155US9725671B2Lubricant film-forming composition and screw joint for steel pipeNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Aug 8, 2017·0 cites·8 claims
- 2254US12104085B2Oil-well metal pipe, and method for producing oil-well metal pipeNIPPON STEEL CORP·Filed 2021·Granted Oct 1, 2024·0 cites·13 claims
- 2354US2021348247A1Steel material for sliding members and method of manufacturing the sameNIPPON STEEL CORP·Filed 2019·Application pending·0 cites
- 2453US12510191B2Oil-well metal pipeNIPPON STEEL CORP·Filed 2022·Granted Dec 30, 2025·0 cites·3 claims
- 2552US2010295412A1Stator coil heating apparatus and stator coil heating methodOET KK·Filed 2008·Application pending·0 cites
- 2651US2009290064A1AV SystemYAMAHA CORP·Filed 2009·Application pending·0 cites
- 2747US8846152B2Antioxidant agent and process for producing metallic materialSHIMODA KAZUHIRO·Filed 2011·Granted Sep 30, 2014·0 cites·13 claims
- 2843US2004195825A1Threaded joint for steel pipesFiled 2003·Application pending·0 cites
- 2942US2015271615A1Acoustic Device and Acoustic Processing MethodYAMAHA CORP·Filed 2013·Application pending·0 cites
- 3039US2003063544A1Optical disk recording apparatus with adaptive power control of laser beamYAMAHA CORP·Filed 2002·Application pending·0 cites
- 3138US8671727B2Methods for producing blank tube for cold drawing and for producing cold drawn tubeTOYODA MASATOSHI·Filed 2012·Granted Mar 18, 2014·0 cites·12 claims
- 3235US9120136B2Drawing method of metallic tube and producing method of metallic tube using sameTOYODA MASATOSHI·Filed 2011·Granted Sep 1, 2015·0 cites·12 claims
- 3335US8557750B2Threaded joint for pipesKURANISHI TAKAO·Filed 2011·Granted Oct 15, 2013·0 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →