72109845
Dec 8, 1960
Jun 5, 1962
AIRCRAFT-NAMELY, ENGINE DRIVEN AIRPLANES, SAILPLANES, GLIDERS, FIXED-WING AIRCRAFT, HELICOPTERS, FLYING BODIESNAMELY, PILOTLESS AIRCRAFT INCLUDING REMOTE-CONTROLLED AIRCRAFTS WITH REACTION DRIVE; LANDING GEAR, UNDERCARRIAGES AND LANDING SUPPORTS INCLUDING DOCKING TROLLEYS FOR AIRCRAFT, STRUCTURAL ELEMENTS OF SYNTHETIC MATERIAL FOR AIRCRAFT AND FLYING BODIES
Nonmetallic Building Materials