71605093
Oct 18, 1950
Jan 1, 1952
OPTICAL INSTRUMENT AND PARTS THEREOF CONSISTING OF A GOGGLE TYPE PERISCOPE SIGHTING INSTRUMENT FOR ATTACHMENT TO THE HEAD OF A PILOT TO LIMIT HIS VISION TO THE INSTRUMENT PANEL OF AN AIRPLANE, AND EMPLOYED IN THE TEACHING AND TESTING OF PILOTS IN THE ART OF INSTRUMENT OPERATION OF AN AIRPLANE
Fancy Goods