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Patents for Spencer Lewis
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
5,812Sep. 26, 1848S. LewisImprovement in Cutting Screws on Rails of Bedsteadswood threading machines
7,264Apr. 09, 1850S. LewisMachine for cutting screws on the rails of bedsteadswood threading machines
7,381May 21, 1850S. LewisImprovement in machines for sawing wooddrag saws
8,416Oct. 07, 1851S. LewisMachine for Cutting Screws on Rails of Bedsteadswood threading machines
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