Alexander Graham Bell (1847-1922), Scottish-born American inventor, 1877 (1890). Artist: Unknown

Alexander Graham Bell (1847-1922), Scottish-born American inventor, 1877 (1890). Artist: Unknown

1-153-000 - Ann Ronan Picture Library/Heritage-Images

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Alexander Graham Bell (1847-1922), Scottish-born American inventor, 1877 (1890). Bell, who patented the telephone in 1876, lecturing at Salem, Massachusetts (top), while friends in his study at Boston listen to his lecture via telephone, 12 February 1877.

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