NBC Sounds the Chimes

 

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NBC had used chimes as a switching cue from its beginnings as a radio network. Many configurations of notes were used until 1929, when NBC settled on the familiar three tones that have become a cultural icon. The G-E-C signal was the first audio service mark, registered with the U.S. Patent and Trademark Office on April 4, 1950.

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1 929

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