Inventor · disambiguated record

Masao Yuga

Also filed as: YUGA MASAO

43 granted patents·10 pending applications·26 citations·filing 2012–2022

95Inventor score

Technology areasC21D C22C

Files withJFE STEEL CORP52 YUGA MASAO1

Top patents by PatentIndex Score

53 records

0197US11306369B2High-strength stainless steel seamless pipe for oil country tubular goods, and method for producing sameJFE STEEL CORP·Filed 2018·Granted Apr 19, 2022·7 cites·4 claims
0290US10876182B2High-strength seamless steel pipe for oil country tubular goods and method of producing the sameJFE STEEL CORP·Filed 2015·Granted Dec 29, 2020·2 cites·12 claims
0390US10844453B2High-strength seamless steel pipe for oil country tubular goods and method of producing the sameJFE STEEL CORP·Filed 2015·Granted Nov 24, 2020·2 cites·6 claims
0489US12291766B2Stainless steel seamless pipe and method for manufacturing sameJFE STEEL CORP·Filed 2020·Granted May 6, 2025·1 cites·16 claims
0589US10640856B2High-strength seamless steel pipe for oil country tubular goods and method of producing the sameJFE STEEL CORP·Filed 2015·Granted May 5, 2020·2 cites·16 claims
0689US10472690B2High-strength seamless steel pipe for oil country tubular goods and method of producing the sameJFE STEEL CORP·Filed 2015·Granted Nov 12, 2019·2 cites·16 claims
0785US9945015B2High-tensile steel plate giving welding heat-affected zone with excellent low-temperature toughness, and process for producing sameJFE STEEL CORP·Filed 2012·Granted Apr 17, 2018·3 cites·8 claims
0882US10975450B2Low alloy high strength thick-walled seamless steel pipe for oil country tubular goodsJFE STEEL CORP·Filed 2016·Granted Apr 13, 2021·1 cites·2 claims
0980US9777358B2Thick-walled, high tensile strength steel with excellent CTOD characteristics of the weld heat-affected zone, and manufacturing method thereofJFE STEEL CORP·Filed 2013·Granted Oct 3, 2017·2 cites·14 claims
1078US9790579B2High tensile strength steel plate having excellent weld heat-affected zone low-temperature toughness and method for producing sameYUGA MASAO·Filed 2012·Granted Oct 17, 2017·3 cites·10 claims
1176US10662493B2Abrasion-resistant steel plate and method for manufacturing the sameJFE STEEL CORP·Filed 2015·Granted May 26, 2020·1 cites·8 claims
1274US12140265B2Seamless pipe and method for manufacturing sameJFE STEEL CORP·Filed 2021·Granted Nov 12, 2024·0 cites·20 claims
1368US12398436B2High-strength stainless steel seamless pipe for oil country tubular goods and method for manufacturing sameJFE STEEL CORP·Filed 2021·Granted Aug 26, 2025·0 cites·12 claims
1468US12157937B2Duplex stainless steel seamless pipe and method for manufacturing sameJFE STEEL CORP·Filed 2019·Granted Dec 3, 2024·0 cites·18 claims
1568US11655526B2Duplex stainless steel and method for producing sameJFE STEEL CORP·Filed 2017·Granted May 23, 2023·0 cites·6 claims
1667US12509752B2Dual-phase stainless steel and dual-phase stainless steel seamless pipeJFE STEEL CORP·Filed 2021·Granted Dec 30, 2025·0 cites·4 claims
1767US12359752B2Stainless steel pipe and method for manufacturing sameJFE STEEL CORP·Filed 2021·Granted Jul 15, 2025·0 cites·21 claims
1867US11111566B2Low alloy high strength seamless steel pipe for oil country tubular goodsJFE STEEL CORP·Filed 2018·Granted Sep 7, 2021·0 cites·4 claims
1966US2024191331A1Stainless steel pipe and method for manufacturing the sameJFE STEEL CORP·Filed 2022·Application pending·0 cites
2065US12227816B2High-strength seamless steel pipe and method for manufacturing sameJFE STEEL CORP·Filed 2020·Granted Feb 18, 2025·0 cites·12 claims
2165US2024124949A1High-strength stainless steel seamless pipe for oil country tubular goods and method for manufacturing sameJFE STEEL CORP·Filed 2022·Application pending·0 cites
2262US12497676B2Stainless steel seamless pipe and method for manufacturing sameJFE STEEL CORP·Filed 2020·Granted Dec 16, 2025·0 cites·4 claims
2362US12497670B2Stainless steel seamless pipe and method for manufacturing stainless steel seamless pipeJFE STEEL CORP·Filed 2021·Granted Dec 16, 2025·0 cites·6 claims
2462US12331371B2Stainless steel pipe and method for manufacturing sameJFE STEEL CORP·Filed 2021·Granted Jun 17, 2025·0 cites·20 claims
2562US12252756B2High-strength seamless steel pipe and method for manufacturing sameJFE STEEL CORP·Filed 2020·Granted Mar 18, 2025·0 cites·6 claims
2662US2024309480A1Duplex stainless steel pipe and method for manufacturing sameJFE STEEL CORP·Filed 2022·Application pending·0 cites
2761US12264376B2Duplex stainless steel and method for manufacturing same, and duplex stainless steel pipeJFE STEEL CORP·Filed 2020·Granted Apr 1, 2025·0 cites·6 claims
2861US12227815B2Seamless steel pipe having desirable sulfuric acid dew-point corrosion resistance, and method for manufacturing sameJFE STEEL CORP·Filed 2020·Granted Feb 18, 2025·0 cites·20 claims
2961US12098438B2Stainless steel seamless pipeJFE STEEL CORP·Filed 2020·Granted Sep 24, 2024·0 cites·8 claims
3061US11773461B2Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing sameJFE STEEL CORP·Filed 2019·Granted Oct 3, 2023·0 cites·10 claims
3160US12221663B2Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing sameJFE STEEL CORP·Filed 2019·Granted Feb 11, 2025·0 cites·10 claims
3260US2023107887A1Stainless steel seamless pipe for oil country tubular goods and method for manufacturing the sameJFE STEEL CORP·Filed 2021·Application pending·0 cites
3360US2023340632A1Stainless steel seamless pipe and method for manufacturing sameJFE STEEL CORP·Filed 2021·Application pending·0 cites
3459US11566301B2Dual-phase stainless steel, and method of production thereofJFE STEEL CORP·Filed 2017·Granted Jan 31, 2023·0 cites·4 claims
3559US11505842B2Low-alloy high-strength seamless steel pipe for oil country tubular goodsJFE STEEL CORP·Filed 2018·Granted Nov 22, 2022·0 cites·4 claims
3659US11268161B2High strength seamless stainless steel pipe and method for producing sameJFE STEEL CORP·Filed 2017·Granted Mar 8, 2022·0 cites·8 claims
3758US2023033540A1High-strength seamless stainless steel pipe for oil wellJFE STEEL CORP·Filed 2020·Application pending·0 cites
3857US12234525B2Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing sameJFE STEEL CORP·Filed 2019·Granted Feb 25, 2025·0 cites·4 claims
3957US11453924B2Low-alloy high-strength seamless steel pipe for oil country tubular goodsJFE STEEL CORP·Filed 2018·Granted Sep 27, 2022·0 cites·4 claims
4056US11414733B2Low-alloy high-strength seamless steel pipe for oil country tubular goodsJFE STEEL CORP·Filed 2018·Granted Aug 16, 2022·0 cites·4 claims
4155US11827949B2Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing sameJFE STEEL CORP·Filed 2018·Granted Nov 28, 2023·0 cites·20 claims
4255US11401570B2Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing sameJFE STEEL CORP·Filed 2018·Granted Aug 2, 2022·0 cites·8 claims
4354US11313007B2High-strength seamless steel pipe for oil country tubular goods, and method for producing the sameJFE STEEL CORP·Filed 2017·Granted Apr 26, 2022·0 cites·6 claims
4453US11286548B2High-strength stainless steel seamless pipe for oil country tubular goods, and method for manufacturing sameJFE STEEL CORP·Filed 2018·Granted Mar 29, 2022·0 cites·9 claims
4551US11186885B2High-strength seamless steel pipe for oil country tubular goods, and production method for high-strength seamless steel pipe for oil country tubular goodsJFE STEEL CORP·Filed 2016·Granted Nov 30, 2021·0 cites·4 claims
4651US2020407814A1Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing sameJFE STEEL CORP·Filed 2018·Application pending·0 cites
4749US2019241989A1Martensitic stainless steel seamless pipe for oil country tubular goods, and method for producing sameJFE STEEL CORP·Filed 2017·Application pending·0 cites
4848US10920297B2High-strength seamless steel pipe for oil country tubular goods and method of producing the sameJFE STEEL CORP·Filed 2015·Granted Feb 16, 2021·0 cites·16 claims
4946US2019048444A1Low alloy high strength seamless steel pipe for oil country tubular goodsJFE STEEL CORP·Filed 2016·Application pending·0 cites
5044US10316385B2High-tensile-strength steel plate and process for producing sameJFE STEEL CORP·Filed 2015·Granted Jun 11, 2019·0 cites·4 claims

Showing the top 50 of 53 patent records by PatentIndex Score.

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →