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Gas Producer

Description: Patent for a new and more efficient type of gas producer.
Date: February 25, 1919
Creator: Modlin, Frank E.
Partner: UNT Libraries Government Documents Department

Even-Balance Pump-Jack

Description: Patent for "increasing the power of the pump jacks" (lines 10-11) for improved uniformity during the upstroke and the downstroke.
Date: February 4, 1919
Creator: Dayton, William L.
Partner: UNT Libraries Government Documents Department

Balancing Pump Jack

Description: Patent for increasing the power of pump jacks and providing simple devices for aiding the driving mechanism. A shifting weight helps balance the sucker rod.
Date: February 4, 1919
Creator: Dayton, William L.
Partner: UNT Libraries Government Documents Department
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