Inventor
OKA MASAHARU
JP16 patents
⚠️ This page may combine multiple inventors who share the name “OKA MASAHARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON STEEL CORP
7 patentsUS6027145AFeb 22, 2000
Joint for steel pipe having high galling resistance and surface treatment method thereof
NIPPON STEEL CORP164 citations95
US6176524B1Jan 23, 2001
Oil well pipe threaded joint
NIPPON STEEL CORP31 citations91
US6585799B1Jul 1, 2003
Cast steel piece and steel product excellent in forming characteristics and method for treatment of molted steel therefor and method for production thereof
NIPPON STEEL CORP15 citations90
US6918969B2Jul 19, 2005
Cast steel and steel material with excellent workability, method for processing molten steel therefor and method for manufacturing the cast steel and steel material
NIPPON STEEL CORP9 citations71
US12221669B2Feb 11, 2025
Hot-rolled steel sheet, hot-dip coated steel sheet, and method for producing hot-rolled steel sheet
NIPPON STEEL CORP0 citations58
US10907236B2Feb 2, 2021
Cold rolled steel sheet for drawn can and method for manufacturing same
NIPPON STEEL CORP1 citations54
US12319977B2Jun 3, 2025
Hot rolled steel sheet and production method thereof
NIPPON STEEL CORP0 citations51
FUNAI ELECTRIC CO
3 patentsNIPPON STEEL & SUMITOMO METAL CORP
3 patentsUS10815553B2Oct 27, 2020
Galvannealed steel sheet and production method thereof
NIPPON STEEL & SUMITOMO METAL CORP1 citations62
US10294551B2May 21, 2019
High-strength low-specific-gravity steel sheet having superior spot weldability
NIPPON STEEL & SUMITOMO METAL CORP0 citations52
US10336037B2Jul 2, 2019
Galvanized steel sheet and method for producing the same
NIPPON STEEL & SUMITOMO METAL CORP0 citations40