Inventor
KOYAMA KUNIO
6 patents
⚠️ This page may combine multiple inventors who share the name “KOYAMA KUNIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NIPPON STEEL CORP
3 patentsUS6532995B1Mar 18, 2003
Super-high-strength line pipe excellent in low temperature toughness and production method thereof
NIPPON STEEL CORP28 citations91
US4355054AOct 19, 1982
Process for production of a low hydrogen type covered arc-electrode
NIPPON STEEL CORP20 citations77
US4221611ASep 9, 1980
Non-fused flux composition for submerged-arc welding
NIPPON STEEL CORP21 citations77