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Patents for Frederic Kraengel
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
231,331Aug. 17, 1880F. KraengelAdjustable Frog for Plane Cutter Adjustmentsplane throat adjustments
231,332Aug. 17, 1880F. KraengelNail-Extractornail extractors
250,080Nov. 29, 1881F. KraengelSpirit Levelinclinometers
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