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Trap

Description: Patent for a trap for catching rats. Illustrations included.
Date: March 21, 1911
Creator: Clark, William Joseph
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Detector for Wireless Signaling Apparatus.

Description: Patent for wireless signaling apparatus which provides a detector which shall be universal in its application, by means of which any of the well known minerals or materials may be employed and removably held in proper position.
Date: November 21, 1911
Creator: Johnson, Maurice Bernays
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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