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]Activities that use this document
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Created by the National Archives Education Team - Patent Analysis: Alexander Graham Bell's Telephone
Created by the National Archives Education Team
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