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Patents Granted on 1800-02-12
Patents 1 - 4 of 4
First set of recordsLast set of records
273XFeb. 12, 1800J.J. HawkinsImprovement in piano fortesmusic instrument maker
274XFeb. 12, 1800H. Killey, IIMethod of covering salt vats from the weathersalt making apparatus
275XFeb. 12, 1800P. LyonEngine for throwing watersteam pumps
276XFeb. 12, 1800N. LaddExtracting Essence of Sumack, Fera, etc for Tanningleatherworker
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