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Improvement in Hair-Triggers for Fire-Arms.

Description: Patent for "an improved trigger for fire-arms which shall be provided with a hair-trigger in such a way that the hair-trigger may be used or not, as may be desired, which shall be complete in itself, so that it may be applied to any kind of fire-arm without change in its construction" (lines 17-23), includes illustrations.
Date: May 20, 1879
Creator: Toepperwein, Emil A. F.
Partner: UNT Libraries Government Documents Department

Marking Attachment for Planters

Description: Patent for a marking attachment for planters, designed primarily for row markers. Illustrations included.
Date: August 20, 1907
Creator: Spenrath, Max
Partner: UNT Libraries Government Documents Department

Dental Plate

Description: Patent for an improved dental plate design that fits better in the mouth of the user and allows for easier speaking and eating.
Date: May 20, 1919
Creator: Glaser, Adolph J.
Partner: UNT Libraries Government Documents Department
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