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Stamp Canceler.

Description: Patent for a new and improved stamp canceler. This design "is to provide a . . . stamp-canceler, which is so constructed that it punctures or perforates the stamp and inks it at the same time, but does not mutilate the letter or other contents of the envelope" (lines 7-12).
Date: May 4, 1886
Creator: Luzenberg, Edward A. & Sachs, Edward
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Compressor for Ice Machines.

Description: Patent for a new and improved ice-machine compressor. This design consists in "an ammonia-compressor, the piston-rod having transverse opening in combination with the valve, stem having slot and shoulder, key held therein by a wedge, and the spring and washer" (lines 90-94).
Date: October 4, 1887
Creator: Schuehle, Jacob
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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