Inventor · disambiguated record
Nao Yoshihara
Also filed as: YOSHIHARA NAO
18 granted patents·8 pending applications·94 citations·filing 1999–2016
92Inventor score
Top patents by PatentIndex Score
26 records- 0189US6372056B1Spring steel superior in workabilityKOBE STEEL LTD·Filed 1999·Granted Apr 16, 2002·34 cites·15 claims
- 0286US7618498B2Steels for high-strength springs excellent in cold workability and quality stabilityKOBE STEEL LTD·Filed 2006·Granted Nov 17, 2009·11 cites·8 claims
- 0383US8192562B2Spring steel wire excellent in fatigue characteristic and wire drawabilityYOSHIHARA NAO·Filed 2007·Granted Jun 5, 2012·5 cites·15 claims
- 0483US8043444B2Steel wire for cold-formed spring excellent in corrosion resistance and method for producing the sameKOBE STEEL LTD·Filed 2006·Granted Oct 25, 2011·5 cites·12 claims
- 0583US7763123B2Spring produced by a process comprising coiling a hard drawn steel wire excellent in fatigue strength and resistance to settingKOBE STEEL LTD·Filed 2009·Granted Jul 27, 2010·4 cites·28 claims
- 0681US9540718B2High-strength steel wire material exhibiting excellent cold-drawing properties, and high-strength steel wireKOBE STEEL LTD·Filed 2014·Granted Jan 10, 2017·2 cites·6 claims
- 0778US7597768B2Steel wire for hard drawn spring excellent in fatigue strength and resistance to settling, and hard drawn spring and method of making thereofKOBE STEEL LTD·Filed 2003·Granted Oct 6, 2009·10 cites·18 claims
- 0874US8382918B2Steel wire material for spring and its producing methodKOBE STEEL LTD·Filed 2011·Granted Feb 26, 2013·1 cites·25 claims
- 0972US7887924B2High-strength steel with excellent unsusceptibility to hydrogen embrittlementKOBE STEEL LTD·Filed 2007·Granted Feb 15, 2011·2 cites·10 claims
- 1070US8557061B2Spring steel with excellent resistance to hydrogen embrittlement and steel wire and spring obtained from the steelYOSHIHARA NAO·Filed 2006·Granted Oct 15, 2013·2 cites·10 claims
- 1168US9611523B2Cold formable spring steel wire excellent in cold cutting capability and fatigue properties and manufacturing process thereofYOSHIHARA NAO·Filed 2006·Granted Apr 4, 2017·1 cites·11 claims
- 1267US9994940B2High carbon steel wire rod having excellent drawabilityOURA HIROSHI·Filed 2011·Granted Jun 12, 2018·1 cites·19 claims
- 1367US9097306B2Steel wire rod for high-strength spring excellent in wire drawability, manufacturing method therefor, and high-strength springISHIDA TOMONOBU·Filed 2011·Granted Aug 4, 2015·2 cites·19 claims
- 1465US6206984B1Non-heat treated wire or bar steel for springsKOBE STEEL LTD·Filed 1999·Granted Mar 27, 2001·14 cites·12 claims
- 1560US2017022580A1High-strength spring steelKOBE STEEL LTD·Filed 2016·Application pending·0 cites
- 1657US10385430B2High-strength steel material having excellent fatigue propertiesKOBE STEEL LTD·Filed 2015·Granted Aug 20, 2019·0 cites·2 claims
- 1757US2009020189A1Steel wire material for spring and its producing methodKOBE STEEL LTD·Filed 2008·Application pending·0 cites
- 1849US7901520B2Spring wire rod excelling in fatigue characteristicsKOBE STEEL LTD·Filed 2008·Granted Mar 8, 2011·0 cites·7 claims
- 1948US2016010196A1High-strength steel wire material exhibiting excellent cold-drawing properties, and high-strength steel wireKOBE STEEL LTD·Filed 2014·Application pending·0 cites
- 2046US2012285585A1High-strength spring steelNAGAMATSU SAYAKA·Filed 2010·Application pending·0 cites
- 2145US2016160306A1Coil spring, and method for manufacturing sameNHK SPRING CO LTD·Filed 2014·Application pending·0 cites
- 2244US9121080B2High-carbon steel wire excellent in wire drawability and fatigue property after wiredrawingOURA HIROSHI·Filed 2011·Granted Sep 1, 2015·0 cites·20 claims
- 2343US9970072B2High-strength spring steel wire with excellent hydrogen embrittlement resistance, manufacturing process therefor, and high-strength springKOBE STEEL LTD·Filed 2013·Granted May 15, 2018·0 cites·12 claims
- 2443US2008308195A1Steel For Springs, Process Of Manufacture For Spring Using This Steel, And Spring Made From Such SteelKOBE STEEL LTD·Filed 2006·Application pending·0 cites
- 2540US2007125455A1Spring steel wire rod excellent in pickling performanceKOBE STEEL LTD·Filed 2006·Application pending·0 cites
- 2638US2015101715A1High strength steel wire for spring excellent in coiling performance and hydrogen embrittlement resistance and method for manufacturing sameKOBE STEEL LTD·Filed 2013·Application pending·0 cites
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