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Patents for R. Schaefer
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
946,140Jan. 11, 1910H.A. KnokeDraw-clampbar and pipe clamps
1,053,556Feb. 18, 1913O. BergstromCorner-clamping appliancemiter and corner clamps
1,067,541Jul. 15, 1913C.A. PalmgrenStapling devicestaplers
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