Charles Babbage Invents Mechanical Calculator
The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...
Pinkerton Suspects Socialite of Espionage
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Professor W.C. Röntgen Discovers X-Rays
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Dictionary Project Falls Behind Schedule
The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...
Stage Actor Charlie Chaplin Tries Making Movies
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Chester Carlson Invents Machine To Copy Documents
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Ferry Boatman Challenges Steamboat Monopoly
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Professor Organizes Bus Boycott
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Inventors Wage Patent War
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Engineers Detonate Huge Blast In New York
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