Amos Dolbear

Amos Emerson Dolbear was an American physicist and inventor. Dolbear researched electrical spark conversion into sound waves and electrical impulses. He was a professor at University of Kentucky in Lexington from 1868 until 1874. In 1874 he became the chair of the physics department at Tufts University in Medford, Massachusetts. In 1899 one of his patents was purchased in an unsuccessful attempt to interfere with Guglielmo Marconis activities in the United States.

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Source: Wikipedia