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Whiffletree

Description: Patent for a whiffletree. Illustration included.
Date: December 10, 1912
Creator: Jackson, Oliver S.
Partner: UNT Libraries Government Documents Department

Rod-Puller.

Description: Patent for a rod puller and "relates to a lifting device for pump-tubing, drill-rods, and the equivalents thereof" (lines 8-10).
Date: June 10, 1913
Creator: Hooker, James H.
Partner: UNT Libraries Government Documents Department
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