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Magnetically-Operated Oil-Well Fishing-Tool.

Description: Patent for an electrically operated tool designed to retrieve lost oil pump plungers or casings from within oil wells.
Date: April 12, 1921
Creator: Dooley, William D.
Partner: UNT Libraries Government Documents Department

Electrically-Controlled Puller For Oil-Well Casings.

Description: Patent for an improved oil well casing puller that has electromagnets that will lock against the inside of the casing and be pulled out of the well. The pulley within the casing can be used accordingly and can also be locked with the casing or released from it.
Date: April 12, 1921
Creator: Dooley, William D.
Partner: UNT Libraries Government Documents Department

Metallic Mold for Concrete Walls

Description: Patent for metallic molds for concrete or plastic walls. These molds have been improved in terms of their construction. Includes illustrations.
Date: April 12, 1921
Creator: Bolton, George W.
Partner: UNT Libraries Government Documents Department

Well-Tubing Catcher

Description: Patent for an improved well tubing catcher, which "provides an equal and positive bearing surface for the gripper slips or dogs in all their adjusted positions" (lines 16-18), including illustrations.
Date: April 12, 1921
Creator: Wilson, Robert A.
Partner: UNT Libraries Government Documents Department

Game-Board.

Description: Patent for a game board that includes barriers, inclines, and depressions in the board which is meant to simulate a game similar to baseball (as well as other games) using a cue ball. The game board also comes with auxiliary barriers to adjust gameplay.
Date: July 12, 1921
Creator: Sterling, Don L.
Partner: UNT Libraries Government Documents Department

Riveting-Machine and the Art of Riveting.

Description: Patent for improving riveting machines "used in the manufacture of leather and similar goods" (lines 12-13) such that "during the riveting operation the end of the rivet is spun and cut off to hold the bur or washer to its work" (lines 16-19).
Date: October 12, 1920
Creator: Shaw, Fred H.
Partner: UNT Libraries Government Documents Department

Sheen-Removing Apparatus.

Description: Patent for a device capable of removing sheen and unsightly stains from clothes, such as garments and coats, to restore them to their original appearance.
Date: October 12, 1920
Creator: Terrell, James M.
Partner: UNT Libraries Government Documents Department
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