72045782
Feb 13, 1958
Mar 31, 1959
OIL WELL TOOLS AND APPARATUS MADE OF RUBBER COMPOSITION, METAL AND COMBINATIONS OF RUBBER COMPOSITION AND METAL-NAMELY, PIPE PROTECTORS, CONNECTORS, AND STABILIZERS; CROWN BLOCK, TRAVELING BLOCK AND SWIVEL BUMPERS; MUD GUNS AND MUD GUN NOZZLES; WIPERS; AND EQUIPMENT FOR USE IN THE INSTALLATION OF WIPERS AND PROTECTORS
Yarns and Threads