KOLLSMAN INSTRUMENTS
AIRCRAFT INSTRUMENTS-NAMELY, ACCELEROMETERS, AIR SPEED INDICATORS, ALTITUDE INSTRUMENTS, ANGLE OF ATTACK INDICATORS, COMPASSES, MACHMETER INDICATORS, PITOTS, PRESSURE GAGES, PICKUPS, SEXTANTS, TACHOMETERS AND SYNCHROSCOPES, VERTICAL SPEED INDICATORS, NAVIGATING DEVICES, ASTRO-TRACKERS AND OPTICAL INSTRUMENTS
Expired · February 6, 1961 · 72113116 ·