The Telephone Cases, 126 U.S. 1 (1888), were a series of U.S. court cases in the 1870s and the 1880s related to the invention of the telephone, which culminated in an 1888 decision of the U.S. Supreme Court that upheld the priority of the patents belonging to Alexander Graham Bell. Those patents were used by the American Bell Telephone Company and the Bell System, although they had also acquired critical microphone patents from Emile Berliner.
The objector (or plaintiff) in the Supreme Court case was initially the Western Union telegraph company, which was then a far-larger and better financed competitor than American Bell Telephone. Western Union advocated several more recent patent claims of Daniel Drawbaugh, Elisha Gray, Antonio Meucci, and Philip Reis in a bid to invalidate Alexander Graham Bell's master and subsidiary telephone patents dating from March 1876. A decision for Western Union would have immediately destroyed the Bell Telephone Company, and might have allowed the former company, instead of the latter, to become the world's largest telecommunications monopoly.
The Supreme Court came within one vote of overturning the Bell patent because of the eloquence of lawyer Lysander Hill for the Peoples Telephone Company. In a lower court, the Peoples Telephone Company stock rose briefly during the early proceedings but dropped after its claimant, Daniel Drawbaugh, took the stand and testified: "I don't remember how I came to it. I had been experimenting in that direction. I don't remember of getting at it by accident either. I don't remember of anyone talking to me of it."