The 150th Anniversary of Telephone Patent
by A. Michael Noll
[This blog is distributed with the permission of the author, A. Michael Noll.]
March 7th 2026 is the 150th anniversary of the award of the patent for the telephone to Alexander Graham Bell. These 150 years have seen an expansion of the telephone in incredible ways to the smart wireless phones in use everywhere, with optical fiber and artificial satellites linking continents with near instantaneous telecommunication and access to all the world’s information and electronic commerce. But even after these 150 years, historians continue to research and debate as to who really invented the telephone.
Bell’s concept for the telephone involved using the loud speaker (receiver) as a microphone (transmitter). The problem was that the electric signal created by this kind of microphone would not generate enough electrical power to cause significant sound from the speaker – it would not have worked.
The electrical inventor Elisha Gray realized this, and invented a liquid transmitter, powered by a direct current battery. In effect, his transmitter caused variable resistance, which then significantly varied the direct current to cause a loud enough sound from the receiver. Bell heard of Vail’s work and wrote a note in the margin of his patent application about the idea. Bell and Vail filed on the same day, and controversy still exists as to who filed first. Back then, in a split decision, the US Supreme Court awarded the invention to Bell.
Perhaps in the end what mattered most was the creation of the Bell System to promote and spread telephonic telecommunication. Bell was had little interest in business, and it was Theodore Vail who headed the American Telephone and Telegraphy Company (AT&T), which owned and ran the Bell System as a monopoly in the United States, until the Bell breakup in 1983. Western Electric is gone, although remnants exist in what is Nokia Bell Labs; the AT&T brand was acquired by Southwestern Bell; and other Bell companies operate under the Verizon brand. The sad outcome is the death of the fundamental research performed in the days of the Bell empire by Bell Telephone Laboratories, Incorporated, which gave us the transistor along with a host of other innovations.
Gray was a co-founder of the Western Electric Manufacturing Company, which was acquired by AT&T as its manufacturer of telephones and related equipment. Was this done to silence Gray as to the credit for the telephone’s patent?
A. Michael Noll
January 10, 2026
