71530346
Aug 2, 1947
Apr 11, 1950
MACHINE KEYS USED TO HOLD MACHINE ELEMENTS IN NONROTATIVE POSITION ON SHAFTS AND THE LIKE OR TO POSITION MACHINE PARTS IN RELATION TO ONE ANOTHER OR FOR LIKE MECHANICAL USES, WOODRUFF KEYS, STRAIGHT AND TAPERED PINS FOR BINDING TOGETHER MACHINE PARTS AND FOR USE AS STOP AND CENTERING PINS, AND MACHINE GEAR RACKS
Yarns and Threads