73498579
Sep 10, 1984
Jan 28, 1986
COMPUTER, CRT DISPLAY, PRINTER, COMPUTER PROGRAMS, AND INSTRUCTION MANUALS USED IN THE PETROLEUM INDUSTRY TO MONITOR THE AMOUNT OF TORQUE AND THE NUMBER OF REVOLUTIONS THAT OCCUR WHEN TWO THREADED CONNECTIONS ON OILFIELD PIPE USED IN A DRILLING RIG ARE SCREWED TOGETHER
Electrical and Scientific Apparatus