Which groundbreaking advertising invention, patented in 1938, allowed companies to broadcast the first television commercials during the 1941 baseball game between the Brooklyn Dodgers and Philadelphia Phillies?

Throughout history, inventions and discoveries have transformed how products are advertised to consumers. Some advertising techniques pioneered decades ago continue to influence modern marketing strategies, while others revolutionized entire industries overnight. Test your knowledge about the inventions and innovations that changed product advertising forever!

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The Bulova Time Signal - a visual overlay showing a watch face with the tagline 'Bulova Watch Time'
The Zenith Radio Commercial System - enabling synchronized audio-visual product demonstrations
The RCA Victor TeleSpot - a mechanical device creating animated product imagery
The Philco Television Advertising Unit - allowing split-screen product comparisons