ROLLUPMATIC
ELECTROMECHANICAL INSTRUMENTS-NAMELY, TELEINDICATORS, SCORE, STOCK QUOTATION, TIME TABLE BOARDS FOR TRANSPORT INDUSTRY-NAMELY, RAIL, BUS, AIRPORT INFORMATION BOARDS, PAGING BOARDS, CALENDAR CLOCKS USING FLAPS AND ADVERTISING SIGNS
Expired · February 6, 1962 · 72137386 ·