US Number-Issued Patents (1836-1861, 1866-1920)
About the Collection
Collection preserves US number-issued patents (1836-1861, 1866-1920).
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Arrangement of fixed rails as a substitute for railroad-switches
Josephus Davenport
1857-01-13
US 0016376 A
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Improvement in feeders for roller cotton-gins
I. John Mallard and Baker, William
1856-06-17
US 0015138 A
