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Patents for John F. C. Preinkert
Patents 1 - 5 of 5
First set of recordsLast set of records
255,011Mar. 14, 1882A.W. NortonLathebacking off attachments
291,933Jan. 15, 1884D.R. PorterWrenchpipe wrenches
301,945Jul. 15, 1884A.C. WinnGagemeasurement gauges
302,079Jul. 15, 1884A.C. WinnCaliper Squaremeasurement gauges
336,915Mar. 02, 1886F.W. GrayHose Spannerfirehose and hydrant wrenches
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