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Tree-Heater
Patent for a tree heater for putting under small trees to protect them from cold weather.
Date:
March 4, 1913
Creator:
Wilson, Luther M.
System:
The Portal to Texas History
Drill.
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
System:
The Portal to Texas History