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Automatic Dumping Cage

Description: Patent for a new and improved automatic dumping cage. This invention is to "use in the shafts of coal and other mines"(line 9-10).
Date: November 30, 1897
Creator: Gordon, William K.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Automatically-Operated Gate and Door

Description: Patent for improvements on automatically opened doors and gates for vehicular passing. The improvements will allow the automatic opening of gates and doors without human attention or interference.
Date: April 9, 1921
Creator: Brown, George W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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