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AIzaSyCYaC8UkdPkQKLFUmpasLV5eC3M802CrcA
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mar 9, 1859 - First Patent For The Revolving Staircase Made By Nathan Ames.

Added to timeline:

26 Sep 2017
0
0
176
Escalator

Date:

mar 9, 1859
Now
~ 159 years ago
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