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Adjustable Book-Cover

Description: Patent for a book cover that can be adjusted to fit any book size.
Date: September 28, 1920
Creator: Toland, Thomas L.
Partner: UNT Libraries Government Documents Department

Lock and Key.

Description: Patent for a lock which requires a key that is adjustable and difficult to duplicate in order to prevent lock picking.
Date: June 28, 1921
Creator: Dove, Bascom A.
Partner: UNT Libraries Government Documents Department

Draft-Equalizer

Description: Patent relating to improvements to draft appliances for tractors. Illustration is included.
Date: September 28, 1920
Creator: Dudley, Thomas J.
Partner: UNT Libraries Government Documents Department

Vegetable-Grading Apparatus.

Description: Patent for a vegetable grading apparatus that delivers select grades of vegetables to the picker, separating the majority of vegetables into containers. The apparatus prevents bruising of vegetables and allows the picker to see all sides of the vegetables.
Date: June 28, 1921
Creator: Rigney, Samuel C.
Partner: UNT Libraries Government Documents Department

Electric Hairbrush

Description: Patent for an improved electric hairbrush having an insulated electrical heating element and separately charged electrically conductive metallic bristles. The hairbrush is designed to straighten hair and/or to electrically treat a user's hair and scalp with a low-voltage current. A device in the handle allows the user to regulate the heating of the element.
Date: November 28, 1922
Creator: Harvey, Birdie
Partner: UNT Libraries Government Documents Department

Refrigerator-Door.

Description: Patent for individual doors for compartments within a refrigerator, to protect items from being exposed to warm air when the refrigerator door is ajar. This patent also provides for the ability to apply doors as attachments to refrigerators without pre-installed compartment doors.
Date: June 28, 1921
Creator: Jurek, Martin
Partner: UNT Libraries Government Documents Department

Process and Apparatus for the Utilization of Heat in Oil-Engines.

Description: Patent for an invention that improves the utilization of waste or surplus heat of internal combustion engines, specifically oil-burning engines of the Diesel type. This invention will assist diesel engines to run satisfactorily on lower or heavier-grade engine oils. This assists in the efficiency and production of Diesel engines.
Date: June 28, 1921
Creator: Lucke, Herbert R.
Partner: UNT Libraries Government Documents Department

Railroad Signal

Description: Patent for automatic railroad signals that emit sound and lights.
Date: December 28, 1920
Creator: Harrell, William H.
Partner: UNT Libraries Government Documents Department

Ventilated Body-Garment.

Description: Patent for new ventilated body-garments "known as union-oversuits or "unionalls"" (lines 15-16) which improves the shoulder coverings and open armpit areas, allowing the passage of air but covering the area from rain.
Date: December 28, 1920
Creator: Jenkins, William M. & Vaughan, William H.
Partner: UNT Libraries Government Documents Department

Automobile-Bed.

Description: Patent for Automobile-Bed which creates a bed space in the back of automobiles for users to comfortably sleep on roll-out mattresses in their vehicles.
Date: December 28, 1920
Creator: Turner, John S.
Partner: UNT Libraries Government Documents Department

Curing-House.

Description: Patent for a curing house for vegetables like sweet potatoes. The inventors "have found that the ceiling and dampers therein are not essential to the successful curing of vegetables; also that an exhaust fan is not necessary and a pent house on the roof with louvers in its sides gives sufficient ventilation and excellent results" (lines 23-28).
Date: September 28, 1920
Creator: Vaughan, Robert B. & Love, Ralph M.
Partner: UNT Libraries Government Documents Department
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