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Neck Yoke

Description: Patent for neck yokes, particularly for hogs, but not made especially for hogs.
Date: December 5, 1916
Creator: McClure, Cicero F.
Partner: UNT Libraries Government Documents Department

Rotary Drilling Apparatus

Description: Patent for a rotary drilling apparatus that specifies in wells and mines.
Date: November 5, 1918
Creator: Robert E. Carmichael
Partner: UNT Libraries Government Documents Department
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