71627380
Apr 1, 1952
Jan 19, 1954
CRANES, CLANSHELL EXCAVATORS, DRAGLINE EXCAVATORS, PILE-DRIVERS, AND BASE MACHINES (COMPRISING REVOLVING UPPER AND NON-RREVOVVING LOWER WORKS) FOR SELECTIVE MOUNTING OF VARIOUS TYPES OF BOOM (INCLUDING SHOVEL BOOMS, DRAGSHOVEL BOOMS, CRANE BOOMS, PILE-DRIVER BOOMS, AND THE LIKE),ALL OF THE FOREGOING BEING CHARACTERIZEDBY HAVING A RUBBER-TIRED WHEEL-TYPE ENGINEPOWERED MOBILE LOWER WORKS;
Yarns and Threads