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Electro-magnetic Railway Signal Patent Model
National Constitution Center
Philadelphia, PA, United States
To advance American industry, inventors competed to submit patents for their designs, including this improved electrical circuit for railway signals. The U.S. Patent Office granted 16,738 patents during the first half of the 1800s. Over the next fifty years, the number of accepted patents rose to 632,695!
2010-02.1
Details
- Title: Electro-magnetic Railway Signal Patent Model
- Date Created: 1870
- Original Source: National Constitution Center
- Rights: National Constitution Center
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