Inventor · disambiguated record
Takumi Ujiro
Also filed as: UJIRO TAKUMI
35 granted patents·7 pending applications·189 citations·filing 1993–2011
97Inventor score
Top patents by PatentIndex Score
42 records- 0195US9587297B2Ferritic stainless steel excellent in corrosion resistance and conductivity and method for manufacturing the same, separator of proton-exchange membrane fuel cell and proton-exchange membrane fuel cellISHII TOMOHIRO·Filed 2011·Granted Mar 7, 2017·10 cites·16 claims
- 0291US8153055B2Ferritic stainless steel with excellent heat resistanceNAKAMURA TETSUYUKI·Filed 2010·Granted Apr 10, 2012·7 cites·10 claims
- 0389US9157137B2Ferritic stainless steel excellent in oxidation resistanceNAKAMURA TETSUYUKI·Filed 2011·Granted Oct 13, 2015·5 cites·6 claims
- 0486US8607941B2Steel sheet for brake disc, and brake discYAMAUCHI KATSUHISA·Filed 2010·Granted Dec 17, 2013·5 cites·15 claims
- 0585US9279172B2Heat-resistance ferritic stainless steelKATO YASUSHI·Filed 2009·Granted Mar 8, 2016·6 cites·11 claims
- 0685US7819991B2Ferritic stainless steel sheet for raw material pipe for bellows pipeJFE STEEL CORP·Filed 2006·Granted Oct 26, 2010·5 cites·8 claims
- 0784US8333849B2Low-carbon martensitic chromium-containing steelYAMAUCHI KATSUHISA·Filed 2009·Granted Dec 18, 2012·6 cites·10 claims
- 0884US6383309B2Ferritic stainless steel plateKAWASAKI STEEL CO·Filed 2000·Granted May 7, 2002·13 cites·5 claims
- 0979US8152937B2Ferritic stainless steel sheet having superior sulfuric acid corrosion resistance and method for manufacturing the sameISHII TOMOHIRO·Filed 2008·Granted Apr 10, 2012·3 cites·9 claims
- 1076US8440029B2Stainless steel having good conductivity and ductility for use in fuel cell and method for producing the sameIDE SHINSUKE·Filed 2010·Granted May 14, 2013·3 cites·2 claims
- 1172US6413332B1Method of producing ferritic Cr-containing steel sheet having excellent ductility, formability, and anti-ridging propertiesKAWASAKI STEEL CO·Filed 2000·Granted Jul 2, 2002·7 cites·11 claims
- 1271US8852361B2Stainless steel sheet with excellent heat and corrosion resistances for brake diskHIRASAWA JUNICHIRO·Filed 2005·Granted Oct 7, 2014·4 cites·7 claims
- 1371US6113710AFerritic stainless steel plate excellent in deep drawability and anti-ridging property and production method thereofKAWASAKI STEEL CO·Filed 1998·Granted Sep 5, 2000·16 cites·9 claims
- 1469US8383034B2Ferritic stainless steel sheet for water heater excellent in corrosion resistance at welded part and steel sheet toughnessJFE STEEL CORP·Filed 2008·Granted Feb 26, 2013·1 cites·3 claims
- 1567US9273382B2Stainless steel foil and catalyst carrier for exhaust gas purifying device using the foilMIZUTANI AKITO·Filed 2011·Granted Mar 1, 2016·2 cites·16 claims
- 1667US8657971B2Brake disk excellent in temper softening resistance and toughnessHIRASAWA JUNICHIRO·Filed 2006·Granted Feb 25, 2014·3 cites·5 claims
- 1767US8357247B2Martensitic stainless steel for disk brakesJFE STEEL CORP·Filed 2004·Granted Jan 22, 2013·7 cites·21 claims
- 1866US6458221B1Ferritic stainless steel plateKAWASAKI STEEL CO·Filed 2000·Granted Oct 1, 2002·5 cites·6 claims
- 1966US5505797AMethod of producing ferritic stainless steel strip with small intra-face anisotropyKAWASAKI STEEL CO·Filed 1995·Granted Apr 9, 1996·15 cites·5 claims
- 2064US6645324B2Method of manufacturing a ferritic stainless steel plateKAWASAKI STEEL CO·Filed 2002·Granted Nov 11, 2003·4 cites·6 claims
- 2160US6500280B2Ferritic Cr-containing steel sheet having excellent ductility, formability, and anti-ridging propertiesKAWASAKI STEEL CO·Filed 2001·Granted Dec 31, 2002·3 cites·3 claims
- 2260US5851316AFerrite stainless steel sheet having less planar anisotropy and excellent anti-ridging characteristics and process for producing sameKAWASAKI STEEL CO·Filed 1996·Granted Dec 22, 1998·13 cites·2 claims
- 2357US7572407B2Martensitic stainless steel sheet and method for making the sameJFE STEEL CORP·Filed 2002·Granted Aug 11, 2009·3 cites·44 claims
- 2456US6737018B2Corrosion-resistant chromium steel for architectural and civil engineering structural elementsJFE STEEL CORP·Filed 2002·Granted May 18, 2004·1 cites·10 claims
- 2555US6419878B2Fe-Cr alloy having excellent initial rust resistance, workability and weldabilityKAWASAKI STEEL CO·Filed 2001·Granted Jul 16, 2002·1 cites·16 claims
- 2655US2011123387A1Ferritic stainless steel excellent in heat resistance and toughnessJFE STEEL CORP·Filed 2009·Application pending·0 cites
- 2754USRE40950EFerritic stainless steel plateJFE STEEL CORP·Filed 2000·Granted Nov 10, 2009·2 cites·8 claims
- 2853US7294212B2High-strength stainless steel material in the form of a wheel rim and method for manufacturing the sameJFE STEEL CORP·Filed 2004·Granted Nov 13, 2007·2 cites·12 claims
- 2952US9130199B2Stainless steel for fuel cell having good corrosion resistance and method for producing the sameIDE SHINSUKE·Filed 2010·Granted Sep 8, 2015·0 cites·14 claims
- 3050US5948181AHot-rolled stainless steel strip and method for producing the sameKAWASAKI STEEL CO·Filed 1997·Granted Sep 7, 1999·7 cites·6 claims
- 3149US2012048662A1Martensitic stainless steel for disc brakesHIRASAWA JUNICHIRO·Filed 2011·Application pending·0 cites
- 3249US2009162240A1Brake disk having high temper softening resistanceJFE STEEL CORP·Filed 2006·Application pending·0 cites
- 3348US5709836AChromium steel sheets having an excellent press formabilityKAWASAKI STEEL CO·Filed 1995·Granted Jan 20, 1998·9 cites·10 claims
- 3447US7429302B2Stainless steel sheet for welded structural components and method for making the sameJFE STEEL CORP·Filed 2003·Granted Sep 30, 2008·2 cites·52 claims
- 3546US2013177837A1Metal sheet for separator of proton-exchange membrane fuel cellNISHIYAMA NAOKI·Filed 2011·Application pending·0 cites
- 3645US5662864AFe-Cr alloy exhibiting excellent ridging resistance and surface characteristicsKAWASAKI STEEL CO·Filed 1996·Granted Sep 2, 1997·8 cites·2 claims
- 3745US2013108945A1Stainless steel for conductive members with low contact electric resistance and method for producing the sameISHII TOMOHIRO·Filed 2010·Application pending·0 cites
- 3843US2005241737A1Cr steel for structural use and method for producing the sameUJIRO TAKUMI·Filed 2003·Application pending·0 cites
- 3939US2004003876A1Structural Fe-Cr steel sheet, manufacturing method thereof, and structural shaped steelJFE STEEL CORP A CORP OF JAPAN·Filed 2003·Application pending·0 cites
- 4038US6217679B1Method for producing chromium-containing hot rolled steel stripKAWASAKI STEEL CO·Filed 1998·Granted Apr 17, 2001·3 cites·12 claims
- 4137US6149744AMethod of making austenitic stainless steel sheetKAWASAKI STEEL CO·Filed 1998·Granted Nov 21, 2000·2 cites·20 claims
- 4237US5350559AFerrite steel which excels in high-temperature strength and toughnessKAWASAKI STEEL CO·Filed 1993·Granted Sep 27, 1994·6 cites·18 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →