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Gopher Trap.

Description: Patent for a new and improved trap for gophers and other subterranean animals. This design utilizes for the first time the combination of spring, jaw, treadle, trigger, and baseboard to ensnare gophers and other varmints.
Date: July 5, 1881
Creator: Norris, Abram
Partner: UNT Libraries Government Documents Department

Drill.

Description: Patent for a simple, durable, and effective drill that "automatically expand[s] in the bottom of the well below the tubing, to cut a hole sufficiently large for the tubing without requiring a second drilling or reaming process" (lines 11-15).
Date: September 25, 1894
Creator: Lindholm, Charlie M.
Partner: UNT Libraries Government Documents Department
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