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in subjects: "oils"  
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Lubricating Device

Description: Patent for lubricating device which is a dispenser for liquids or semi liquids to come out of.
Date: February 8, 1916
Creator: Aycock, Nathaniel. M
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Filter.

Description: Patent for an improvement in filters to remove impurities from gasoline and oil and to reuse the gasoline and oil. Includes illustrations.
Date: February 4, 1919
Creator: Northrup, Early
Item Type: Refine your search to only Patent
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.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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