73595311
Apr 25, 1986
Mar 22, 1988
PASSIVE LIGHT TRANSFER DEVICES FOR TRANSFERRING AND AMPLIFYING VISUAL IMAGES FOR DISPLAY ON A SCREEN FOR USE IN ARENAS, STADIA, AIRPORTS, BILLBOARDS, TRANSPORTATION CENTERS, EDUCATIONAL FACILITIES, GOLF COURSES, TRADE CENTERS, HOTELS, RACE TRACKS, SPORTS FACILITIES, CONCERT HALLS, AMUSEMENT PARKS, SHOPPING CENTERS, MUSEUMS, SKI AREAS, CLOSED CIRCUIT EVENTS, SEAPORT TERMINALS, CONVENTIONS, AND OUTDOOR LOCATIONS
Electrical and Scientific Apparatus