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Envelop.

Description: Patent for an envelope that employs a lock and seal mechanism to increase security of contents. The envelope cannot be opened without tampering or mutilating the envelope.
Date: January 26, 1915
Creator: Wallace, Curtis C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Automatic Trailing Device

Description: Patent for an automatic trailing device. This device is made to "successfully follow the tracks of the front vehicle without the use of a driver on the vehicle in tow" (lines 14-17).
Date: February 24, 1920
Creator: Sloan, Charles Lee
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Combined Rat and Mouse Trap.

Description: Patent for a cheaper and more effective trap that displays live bait but is unreachable to animals. The trap will make it "impossible for animals to escape after they have been captured" (lines 26-28), including illustrations.
Date: March 7, 1916
Creator: Bevers, William S., Jr.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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