Inventor

RANTELL TERRY D

GB3 patents

Patents

3 patents

US4997548AMar 5, 1991

Coal extraction

COAL INDUSTRY PATENTS LTD18 citations66

US4521291AJun 4, 1985

Coal extraction

COAL INDUSTRY PATENTS LTD10 citations66

US4487682ADec 11, 1984

Coal extraction

COAL INDUSTRY PATENTS LTD3 citations57