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Patents for William W. Calvert
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
6,978XMar. 31, 1832A. Messenger, R. Southwick, W.W. CalvertSpinning wool and the manufacture of heavy fabricksspinner
9,098XSep. 18, 1835W.W. CalvertWool or flax to brush into teethbrushes or brooms
9,863XJul. 02, 1836W.W. CalvertWool and flax comberspinner
RX-52Sep. 09, 1843G.W. LymanImprovement to brush wool or flax into teeth set in cylinder or otherwisebrushes or brooms
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