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Patent for a well tubing cage which provides support for well tubes so that a second pipe is not required. Illustrations included.

Date: January 17, 1911

Creator: Harpham, Harry C.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a back pressure valve for well drilling which may be "removed from the well with facility and despatch" (lines 18-20).

Date: January 18, 1910

Creator: Neighbors, Charles C.

Item Type: Patent

Partner: UNT Libraries Government Documents Department

Patent for a well mechanism that provides a coupling with strong, tight joints for the other parts of the mechanism. Illustrations included.

Date: January 26, 1909

Creator: Layne, Mahlon E.

Item Type: Patent

Partner: UNT Libraries Government Documents Department