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Valve.

Description: Patent for "new and useful Improvements in Valves" (lines 5-6) used in pneumatic inner tubes to stop leakage, including illustrations.
Date: December 14, 1920
Creator: Cheek, Alex L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Linting Machine.

Description: Patent for a linting machine (Carver type) that contains an air pocket at the end of the passage to prevent cotton from clogging the machine.
Date: August 10, 1920
Creator: Woodrow, George N. & Bruce, Thomas D.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Bottle-Holder.

Description: Patent for an ink bottle holder that allows for sturdy tilting and prevents ink from spilling.
Date: April 27, 1920
Creator: Smith, Edwin Ruthven
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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