Inventor

CHIZIIWA RIKIO

JP2 patents

Patents

2 patents

US5147474ASep 15, 1992

Building construction steel having excellent fire resistance and low yield ratio

NIPPON STEEL CORP9 citations68

US4990196AFeb 5, 1991

Process for manufacturing building construction steel having excellent fire resistance and low yield ratio

NIPPON STEEL CORP8 citations68