Drill-Support.
Description:
Patent for "new and useful Improvements in Drill-Supports, of which the following is a specification. This invention relates to drilling apparatus, and more particularly to an apparatus of this character for use in coal or other mines for boring or drilling holes for blasting charges and other purposes" (lines 6-13).
Date:
November 23, 1915
Creator:
Williams, Benjamin F. & Mayfield, James W.
Item Type:
Refine your search to only
Patent
Partner:
UNT Libraries Government Documents Department