U.S. federal trademark · Serial No. 71605093 · Reg. No. 0552859
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
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