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Trailer.

Description: Patent for trailers for attachment to trucks that is strong and compact and will not be distorted by the turning of the trailer relative to the truck.
Date: August 31, 1920
Creator: Feigelson, Alexander
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Tool Joint.

Description: Patent for a screw-threaded tool joint used for drill pipes on rotary drilling rigs.
Date: August 10, 1920
Creator: Lyle, Henry Claude
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Pipe Coupling.

Description: Patent for pipe coupling in which the ends of pipes have interlocking attachments which can be both dissembled and reinforced for protection against accidental disengagement.
Date: August 17, 1920
Creator: McCullar, Willie A. & Ayraud, Jules J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Dynamo Electric Machine

Description: Patent for Improvement of Dynamo-Electric Machines. The improvement turns electric energy into mechanical entry.
Date: August 10, 1920
Creator: Reynolds, William T. & Reynolds, Bruce A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Cuff-Link.

Description: Patent for new and useful improvements in cuff links that do not separate from sleeves and help with any decoration.
Date: August 17, 1920
Creator: Hall, James L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Automatic Safety Target.

Description: Patent for a target device for pistols and rifles which allows for the motion of the target being hit to move another target into view.
Date: August 3, 1920
Creator: Briggs, George F.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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