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Patents for P. F. Nagel
Patents 1 - 2 of 2
First set of recordsLast set of records
NumberDatePatenteeTitleType
686,497Nov. 12, 1901T. WiedmannTelescopic Micrometer Gageinside micrometers
1,283,740Nov. 05, 1918C.B. GroffDrill
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