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Patents for J. R. Keller
Patents 1 - 5 of 5
First set of recordsLast set of records
PictureNumberDatePatenteeTitle
784,903Mar. 14, 1905F.J. StemmrichCombination Gage
825,648Jul. 10, 1906J.F. HaworthViolin-Makers' Calipers
  953,346Mar. 29, 1910J. NewbauerWrench
1,254,141Jan. 22, 1918C.A. HumphreysGage
  1,267,287May 21, 1918A. SilvermanIlluminator for Microscopes
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