Tesla and Marconi

Thomas Edison 1865-1931

1889 - 1893
1896

Nikola Tesla 1856-1943

1891
1893 - 1899
1895
March, 1901
1905
1930

Guglielemo Marconi 1874-1937

1894
1900
1901
1903
1905
1909
1912
1930

Robber Barrons and Trust Busters

1893
September, 1901
November, 1901 - March, 1904