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February 21, 1924 - Franklin M. Doolittle applied for a federal patent for "Radiotelephony." It was granted by the U.S. Patent Office on November 4, 1924.

excerpt of Franklin M. Doolittle's 1924 patent application relating to Radiotelephony

Doolittle was the founder of New Haven, Connecticut's radio station, WPAJ. It was renamed WDRC in 1925 and moved to Hartford in 1930.

Click here to read about Doolittle's other patents: 1921, 1927 & 1931.

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