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Trowel.

Description: Patent for "new and useful improvements in Trowels." (lines 8-9) including instructions and illustrations.
Date: March 2, 1920
Creator: Parker, Barton J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Roller Boring-Drill

Description: Patent for a roller boring drill in which "the cutting rollers are arranged on the drill in a novel manner." Object of invention is to keep the drill centered in the hole to prevent wobbling.
Date: March 2, 1915
Creator: Hughes, Howard R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Roller Boring-Drill

Description: Patent for roller boring drill that provides the cutting device to maintain clearance of the drill-head and can be adjusted to compensate for wear.
Date: March 2, 1915
Creator: Hughes, Howard R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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