Inventor · disambiguated record
Masayuki Sagara
Also filed as: SAGARA MASAYUKI
12 granted patents·8 pending applications·23 citations·filing 1999–2023
84Inventor score
Files withNIPPON STEEL & SUMITOMO METAL CORP8NIPPON STEEL CORP6SUMITOMO METAL IND2MURAKAMI HIROAKI1OTOME YOHEI1
Top patents by PatentIndex Score
20 records- 0185US11066719B2Duplex stainless steel and method of manufacturing duplex stainless steelNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Granted Jul 20, 2021·2 cites·5 claims
- 0276US7238434B2Welded structure having improved resistance to stress corrosion crackingSUMITOMO METAL IND·Filed 2006·Granted Jul 3, 2007·2 cites·16 claims
- 0368US2025179618A1Steel materialNIPPON STEEL CORP·Filed 2023·Application pending·0 cites
- 0468US2025215544A1Steel materialNIPPON STEEL CORP·Filed 2023·Application pending·0 cites
- 0566US8701455B2Method for manufacturing a high alloy pipeSAGARA MASAYUKI·Filed 2009·Granted Apr 22, 2014·2 cites·2 claims
- 0665US8245552B2Process for producing high-alloy seamless tubeMURAKAMI HIROAKI·Filed 2010·Granted Aug 21, 2012·1 cites·17 claims
- 0763US11970759B2Martensitic stainless seamless steel pipeNIPPON STEEL CORP·Filed 2019·Granted Apr 30, 2024·0 cites·17 claims
- 0863US11041232B2Austenitic stainless steel and production method thereforNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Granted Jun 22, 2021·0 cites·21 claims
- 0962US12241148B2Alloy material and oil-well seamless pipeNIPPON STEEL CORP·Filed 2020·Granted Mar 4, 2025·0 cites·6 claims
- 1061US11965232B2Martensitic stainless seamless steel pipeNIPPON STEEL CORP·Filed 2019·Granted Apr 23, 2024·0 cites·8 claims
- 1160US6171547B1Austenitic stainless steel having excellent sulfuric acid corrosion resistance and excellent workabilitySUMITOMO METAL IND·Filed 1999·Granted Jan 9, 2001·16 cites·15 claims
- 1256US10557574B2Ni—Cr alloy material and seamless oil country tubular goods using the sameNIPPON STEEL & SUMITOMO METAL CORP·Filed 2014·Granted Feb 11, 2020·0 cites·16 claims
- 1356US10202675B2Duplex stainless steelNIPPON STEEL & SUMITOMO METAL CORP·Filed 2013·Granted Feb 12, 2019·0 cites·2 claims
- 1450US2009081069A1Austenitic stainless steelTAKEDA KIYOKO·Filed 2008·Application pending·0 cites
- 1547US10280487B2High alloy for oil wellNIPPON STEEL & SUMITOMO METAL CORP·Filed 2015·Granted May 7, 2019·0 cites·4 claims
- 1647US2020332378A1Duplex stainless steel and method for producing duplex stainless steelNIPPON STEEL CORP·Filed 2018·Application pending·0 cites
- 1744US2019177808A1Austenitic Stainless SteelNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Application pending·0 cites
- 1843US2019105727A1Welding Structure MemberNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Application pending·0 cites
- 1943US2019126408A1Welding Structure MemberNIPPON STEEL & SUMITOMO METAL CORP·Filed 2017·Application pending·0 cites
- 2039US2012031534A1METHOD FOR PRODUCING HIGH-STRENGTH Cr-Ni ALLOY SEAMLESS PIPEOTOME YOHEI·Filed 2011·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →