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

Description: Patent for improvements to the tractor with adjustable framework for the wheels (narrower or wider).
Date: March 23, 1920
Creator: Weaver, William S.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Pump

Description: Patent for an improvement on the design of pumps used in the oil industry. This uses a combination of water, sand, grits, and other sediments for deep wells.
Date: April 23, 1920
Creator: Scott, Floyd L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Unscrewing Device for Pipe-Joints.

Description: Patent for an unscrewing device for pipe-joints, in the event that the drill stem gets stuck while drilling wells. This invention allows the user to unscrew "the joints of the drill stem" and withdraw "the same without the use of the left hand threaded string of pipe" (lines 35-38).
Date: March 23, 1920
Creator: Edwards, Charles R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Gate-Latch.

Description: Patent for a gate-latch that latches closed with extension of the gate, but allows the gate to open by elevating said latch.
Date: November 23, 1920
Creator: Bramblett, Benjamin F.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Elevator.

Description: Patent for a new and improved design of elevators "for the purpose of preventing accidents" (lines 26-27) by locking the entrance doors while the elevator is moving, including illustrations. It is designed to be used by passengers but can also be adapted to be used as a freight elevator.
Date: November 23, 1920
Creator: Williams, George M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Sliding Caster

Description: Patent for improvements to furniture sliding casters for protecting the furniture, as well as floors and carpets when moving furniture. Improvements include caster prongs "which are set back from the outer margin of the caster so as not to split or mutilate the [furniture] leg" (lines 23-25) and casters that are "easily casted or stamped out from sheet metal [ . . . ] which therefore may be cheaply and easily manufactured" (lines 29-32).
Date: November 23, 1920
Creator: Preston, Charles L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Culvert.

Description: Patent for a culvert which is to be used for sewers or other underground conveyers. Its is to be composed of varying materials that can be easily shipped and jointed together to form the sewer or other underground conveyer.
Date: March 23, 1920
Creator: Charliss, Charles F. J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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