Tesla Company letterhead. Note the words "World Wireless Telephone Transmitter."
This publicity photo taken at Colorado Springs was a double exposure. Tesla poses with his "magnifying transmitter" capable of producing
A telephone operator at the Central Office wears a portable headset made by the American Bell Telephone Company, 1923. (Photo by Hulton Arch
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Wireless Luggage Finder: Electronic luggage tag with a transmitter and wireless recognition key fob. The tag flashes, sounds and vibrates
Tesla with one of his famous "wireless" lamps. Published on the cover of the Electrical Experimenter in 1919.