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in creator/contributor: "Vrooman, E. E."  
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Hot-Air Mixer

Description: Patent for a device that will create hot air to be delivered to the manifold of gas-powered engines in motor vehicles when the operator pushes a plunger that will open an intake valve.
Date: March 9, 1920
Creator: Ingraham, Jerome H.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Cotton-Stalk Cutter

Description: Patent for a more efficient and simple cotton stalk chopper with the ability for the chopping drum to be moved up and down in the on and off positions.
Date: March 4, 1913
Creator: Thomsen, John
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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