On January 19, 1878, Thomas Edison patented speaking telegraph (or telephone) in Italy. Although Bell invented telephone first, Edison’s invention of the carbon-button transmitter proved…
On January 15, 1846, Samuel Morse received patent for an improved single-wire telegraph system. He also helped to develop the commercial use of telegraphy. By…
On November 17, 1891, Emile Berliner was issued a patent for a combined telegraph and telephone. …
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