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...

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...

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...

Vuelve Sures y nortes

Tras una larga ausencia,  vuelve. ¡Espérala!

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...

Vuelve Sures y Nortes

Tras una larga ausencia, está próxima a regresar. ¡Espérala!

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 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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