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in place name: "United States - Texas - Harris County - Houston"  
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Hydraulic Swivel.

Description: Patent for a hydraulic swivel which may be used for well drilling, has an inlet at the side, and is designed to be in few parts for reduced packaging.
Date: May 24, 1921
Creator: King, Walter E.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Sample-Taking Device.

Description: Patent for a sample-taking device to be used in well-drilling processes, which is unique in its simple construction, low manufacturing costs, and ease of use.
Date: May 24, 1921
Creator: Christian, Walton G.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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