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Patents Granted on 1831-11-02
Patents 1 - 3 of 3
First set of recordsLast set of records
6,819XNov. 02, 1831W. BrownTanning apparatus removing the bark from the letches by means of water
6,820XNov. 02, 1831E. BurgonzioTricylindric machine operating by water fall
6,821XNov. 02, 1831S. KrauserWheels for railroad cars to prevent friction
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