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The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...

Ferry Boatman Challenges Steamboat Monopoly

The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...

Chester Carlson Invents Machine To Copy Documents

The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...

Professor Organizes Bus Boycott

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

The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...

English Gentleman Invents Photography

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

The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...

Alamo Falls, Texas Army Retreats

The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...

Printer Invents Typewriting Machine

The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...

Professor W.C. Röntgen Discovers X-Rays

The model department of the United States Patent Office in Washington is illuminated here and there with the original models of the very great...

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