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Shocker.

Description: Patent for improving automatic grain shockers and cappers by adding adapted frames, with illustrations.
Date: June 15, 1920
Creator: Groves, Charles H.
Partner: UNT Libraries Government Documents Department

Rotary Drilling-Machine.

Description: Patent for well drilling rigs also known as rotaries that provides a new way for controlling the slips that eliminates all danger of injury to workers.
Date: June 1, 1920
Creator: Black, Lee J.
Partner: UNT Libraries Government Documents Department

Float-Controlled Liquid-Gaging and Cut-Off Means.

Description: Patent for an automatic cut off device for oil tanks that indicates the amount of water in an oil tank and will automatically close the discharge opening when all the water has been discarded from the tank.
Date: June 29, 1920
Creator: Waldrep, Granville J.
Partner: UNT Libraries Government Documents Department

Coaling Device.

Description: Patent for coal colliers that breaks the coal into small pieces and lifts the coal to pour the coal into the ship's bunkers.
Date: June 22, 1920
Creator: Buchanan, Stewart Harold
Partner: UNT Libraries Government Documents Department

Burner.

Description: Patent for improvements in burners to allow them to use liquid fuel such as oil.
Date: June 1, 1920
Creator: Placette, Joeseph G.
Partner: UNT Libraries Government Documents Department
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