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Cattle-Guard.

Description: Patent for a new improvement in cattle guards, including instructions and illustrations.
Date: July 4, 1899
Creator: Arnold, Eliphalet Lester
Partner: UNT Libraries Government Documents Department

Nut Lock

Description: Patent for a mechanism to lock a nut in place on a bolt that also automatically releases when a wrench is applied to turn the nut.
Date: August 4, 1914
Creator: Edwards, Whitfield H.
Partner: UNT Libraries Government Documents Department

Railway-Rail Brace.

Description: Patent for a new railway-rail brace designed "particularly to be used on curves of rail-way tracks, and which ties the rails as to prevent spreading of said rails" (lines 13-16), including illustrations.
Date: July 4, 1916
Creator: Barnes, Ned Eastman
Partner: UNT Libraries Government Documents Department
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