On New Year's Eve, 1879, Thomas Edison unveiled his newest invention: the electric light. Reporters came from all over the U.S. to see Edison's Menlo Park lab lit up with his incandescent bulbs.
On December 7, 1877, Edison demonstrated his phonograph at the New York City offices of the nation's leading technical weekly publication, Scientific American.
In February 1881, Thomas Edison established the headquarters of the Edison Electric Light Company in New York City.
Alexander Graham Bell demonstrated his new invention, the telephone, at the 1876 Centennial Exposition in Philadelphia’s Fairmount Park.