P

Inventor

SAGARA MASAYUKI

JP13 patents
⚠️ This page may combine multiple inventors who share the name “SAGARA MASAYUKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

NIPPON STEEL & SUMITOMO METAL CORP

5 patents
US11066719B2Jul 20, 2021

Duplex stainless steel and method of manufacturing duplex stainless steel

NIPPON STEEL & SUMITOMO METAL CORP2 citations67
US11041232B2Jun 22, 2021

Austenitic stainless steel and production method therefor

NIPPON STEEL & SUMITOMO METAL CORP0 citations61
US10280487B2May 7, 2019

High alloy for oil well

NIPPON STEEL & SUMITOMO METAL CORP0 citations44
US10202675B2Feb 12, 2019

Duplex stainless steel

NIPPON STEEL & SUMITOMO METAL CORP0 citations44
US10557574B2Feb 11, 2020

Ni—Cr alloy material and seamless oil country tubular goods using the same

NIPPON STEEL & SUMITOMO METAL CORP0 citations39

NIPPON STEEL CORP

4 patents
US11970759B2Apr 30, 2024

Martensitic stainless seamless steel pipe

NIPPON STEEL CORP0 citations57
US12241148B2Mar 4, 2025

Alloy material and oil-well seamless pipe

NIPPON STEEL CORP0 citations50
US11965232B2Apr 23, 2024

Martensitic stainless seamless steel pipe

NIPPON STEEL CORP0 citations45
US12522905B2Jan 13, 2026

Duplex stainless steel seamless pipe

NIPPON STEEL CORP0 citations44

SUMITOMO METAL IND

2 patents
US6171547B1Jan 9, 2001

Austenitic stainless steel having excellent sulfuric acid corrosion resistance and excellent workability

SUMITOMO METAL IND16 citations82
US7238434B2Jul 3, 2007

Welded structure having improved resistance to stress corrosion cracking

SUMITOMO METAL IND2 citations62

SAGARA MASAYUKI

1 patent
US8701455B2Apr 22, 2014

Method for manufacturing a high alloy pipe

SAGARA MASAYUKI2 citations53

MURAKAMI HIROAKI

1 patent
US8245552B2Aug 21, 2012

Process for producing high-alloy seamless tube

MURAKAMI HIROAKI1 citations46