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Tree-Heater

Description: Patent for a tree heater for putting under small trees to protect them from cold weather.
Date: March 4, 1913
Creator: Wilson, Luther M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Drill.

Description: Patent for a drill especially adapted for use in rock and earth formations. The drill has a number of separate cutters that are secured onto a head and detachable, which gives the tool many advantages.
Date: November 4, 1913
Creator: Weathersby, Fred Richard
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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