Drawing for Improvements in Telegraphy

3/7/1876

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After years of experiments, Alexander Graham Bell finally found a way to transmit speech. Bell’s attorney filed this patent application for the telephone on February 14, 1876. The patent was issued on March 7, 1876

This primary source comes from the Records of the Patent and Trademark Office.

National Archives Identifier: 595437

Full Citation: Drawing for Improvements in Telegraphy; 3/7/1876; Records of the Patent and Trademark Office, Record Group 241. [Online Version, https://www.docsteach.org/documents/document/drawing-for-improvements-in-telegraphy, April 30, 2025]

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