Horizontal-Drilling Machine.
Description:
Patent for an easily adjustable and transportable machine that drills a horizontal hole in the ground to accompany a previous invention of the inventor, a method for the destruction of military fortifications. The machine's mechanisms are so housed to protect against exploding shells and includes illustrations.
Date:
May 8, 1917
Creator:
Hughes, Howard R.
Item Type:
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Patent
Partner:
UNT Libraries Government Documents Department