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All Patents in class 175/286
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
4,194Sep. 17, 1845R.A. Stratton, T.S. SpeakmanApparatus for Boring Rocks or Earthstone boring and drilling machines
315,130Apr. 07, 1885J.W. Day, W.H. DavenportCutter Head for Rifling Machinesrifling machines
410,311Sep. 03, 1889M.T. ChapmanExpansion Drillwell drilling machines
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