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Canceling Stamp.

Description: Patent for a new and improved stamp canceler. This design utilizes a washer, flanges, and vertical slots "for the purpose of adjusting the roughened face of the head . . . so that the correct operation of the face is insured" (65-68). This represents an improvement over previous stamp cancelers.
Date: April 19, 1881
Creator: Grothaus, Frederick E.
Partner: UNT Libraries Government Documents Department

Rotary Brush

Description: Patent for a brush operated by a motor. Illustrations included.
Date: May 19, 1908
Creator: Stoerr, Max & Kuettner, Max
Partner: UNT Libraries Government Documents Department

Poultry Feeder and Waterer

Description: Patent for a feeder designed to supply food and water to poultry.
Date: May 19, 1908
Creator: Kuettner, Max
Partner: UNT Libraries Government Documents Department
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