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Hydraulic Swivel.

Description: Patent for a hydraulic swivel used with wells including instructions and illustrations.
Date: May 16, 1911
Creator: Layne, Mahlon E.; Hall, Samuel N. & Layne, Charles F.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Rail Fastener

Description: Patent for a rail fastener for concrete rail ties. It is a bolt receiver to be placed in concrete rail ties to allow the bolts to be held securely.
Date: March 16, 1911
Creator: Wessel, Frederick
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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