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Rotary Boring-Drill.

Description: Patent for improvements to rotary boring drills that enable a drill to be assembled and disassembled without a tool and that ensure the removable cutters do not come off during operation.
Date: June 26, 1917
Creator: Hughes, Howard R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Earth-Auger.

Description: Patent for a device that drills into the ground and lifts the contents into a metal container. The hand-operated device also has wings that expand to let the user know when to empty the contents.
Date: April 10, 1917
Creator: Phillips, Dave T.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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