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Ditching-Machine

Description: Patent for a ditching machine to be used in railroad construction. Illustrations included.
Date: September 10, 1907
Creator: Griffin, George Conrad
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Grader-Blade.

Description: Patent for a new form of grader blade for road graders and ditchers for road and ditch work, with illustration.
Date: December 4, 1917
Creator: Wendell, Benjamin J.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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