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Improvement in Portable Derricks.
Patent for improvement in portable derricks by using an “adjustable crane mounted on a truck-platform, having an overhead frame for the support of the upper end of the crane-post, and braces for staying the frame, so that the crane can be turned around to overhang the sides.” (Lines 6-11) Illustration is included.
Date:
May 16, 1876
Creator:
Reams, Shirwood Y.
System:
The Portal to Texas History