Inventor

SHIRASAWA NAOYA

JP3 patents

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

NIPPON STEEL CORP

2 patents

US12371765B2Jul 29, 2025

Seamless steel pipe suitable for use in sour environment

NIPPON STEEL CORP0 citations55

US11214855B2Jan 4, 2022

Piercer plug and method of manufacturing the same

NIPPON STEEL CORP0 citations46

NIPPON STEEL & SUMITOMO METAL CORP

1 patent

US10888906B2Jan 12, 2021

Method of manufacturing piercer plug

NIPPON STEEL & SUMITOMO METAL CORP1 citations56