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All Patents in class 175/400
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
574,980Jan. 12, 1897C. BornetBit or Drill for Borers, &c., and Manufacture of Samestone boring and drilling machines
945,735Jan. 04, 1910M. HartsocgBit-chuck and bit
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