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Patents for Philip Schrag
Patents 1 - 4 of 4
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
  14,296Feb. 19, 1856W.J. von Kammerhueber, P. SchragSawing Stone
45,679Dec. 27, 1864P. SchragImprovement in machines for sandpapering pencils
103,241May 17, 1870P. Schrag, P. HufelandImprovement in machines for cutting off lead-pencils
RE5,236Jan. 14, 1873P. Schrag, P. HufelandMachine for cutting off pencils
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