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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Manner of dressing millstones with ventilators for cooling flour, &c.
Pendleton Cheek
1841-08-21
2222
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Condenser of steam-engines and apparatus for supplying the boilers with water
Josephus Echols
1841-08-11
2212
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Apparatus employed for separating gold from its ores and the earthy substances combined with it
Thomas Seay
1841-05-04
2078
