Inventor
KAMITANI HIROKI
JP16 patents
⚠️ This page may combine multiple inventors who share the name “KAMITANI HIROKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON STEEL CORP
13 patentsUS11155893B2Oct 26, 2021
Steel material suitable for use in sour environment
NIPPON STEEL CORP2 citations72
US12054798B2Aug 6, 2024
Steel material and method for producing steel material
NIPPON STEEL CORP0 citations61
US11332813B2May 17, 2022
Steel material suitable for use in sour environment
NIPPON STEEL CORP0 citations61
US11078558B2Aug 3, 2021
Steel material, oil-well steel pipe, and method for producing steel material
NIPPON STEEL CORP0 citations61
US11174539B2Nov 16, 2021
Steel material suitable for use in sour environment
NIPPON STEEL CORP0 citations59
US12371765B2Jul 29, 2025
Seamless steel pipe suitable for use in sour environment
NIPPON STEEL CORP0 citations55
US11773460B2Oct 3, 2023
Steel pipe and method for producing steel pipe
NIPPON STEEL CORP0 citations51
US11643712B2May 9, 2023
Steel pipe and method for producing steel pipe
NIPPON STEEL CORP0 citations51
US11434554B2Sep 6, 2022
Steel material suitable for use in sour environment
NIPPON STEEL CORP0 citations51
US12435401B2Oct 7, 2025
Steel material
NIPPON STEEL CORP0 citations48
US11898216B2Feb 13, 2024
Seamless steel pipe heat-treatment-finishing-treatment continuous facility
NIPPON STEEL CORP0 citations48
US11905580B2Feb 20, 2024
Seamless steel pipe suitable for use in sour environment
NIPPON STEEL CORP0 citations47
US11891680B2Feb 6, 2024
Steel material suitable for use in sour environment
NIPPON STEEL CORP0 citations47
NIPPON STEEL & SUMITOMO METAL CORP
3 patentsUS11313005B2Apr 26, 2022
Seamless steel pipe and method for producing the seamless steel pipe
NIPPON STEEL & SUMITOMO METAL CORP2 citations66
US11066718B2Jul 20, 2021
Method of manufacturing stainless pipe for oil wells and stainless steel pipe for oil wells
NIPPON STEEL & SUMITOMO METAL CORP0 citations46
US10487373B2Nov 26, 2019
Steel pipe for line pipe and method of manufacturing the same
NIPPON STEEL & SUMITOMO METAL CORP0 citations39