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Stamp-Affixing Machine.

Description: Patent for a stamp affixing machine, which attaches stamps from a roll to envelopes inserted into the machine.
Date: March 15, 1910
Creator: Brents, William R.
Partner: UNT Libraries Government Documents Department

Safety-Casing Clamp

Description: Patent for a tool that supports the drilling and operating of oil and gas wells. Specifically, the patented tool allows a strong method of sealing the smaller casing inside the larger casing, as the larger casing is pulled out of the well. Includes illustrations.
Date: March 15, 1921
Creator: Angus, William M.
Partner: UNT Libraries Government Documents Department

Sash-Fastener.

Description: Patent for a "device which will lock the sashes of a window when they are closed and which will secure them in any desired adjustment," (lines 11-14) including instructions and illustrations.
Date: March 15, 1892
Creator: Taber, William M.
Partner: UNT Libraries Government Documents Department
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