Blast From The Past: Two Way Telegraph

 

U.S. Patent No. 482,974 is a historical patent issued to the prolific American inventor Thomas A. Edison on August 9, 1892, for a "Telegraph".

This specific patent covered Edison's critical design improvements for a two-way (bi-directional) telegraph system. It allowed electrical communication signals to travel in both directions simultaneously along a single wire without interfering with one another.

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