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Rock-Drill.
Patent for a composite rock drill composed of granular metal or minerals held together in a binder to present sharp points for the efficient drilling of rock and other substances.
Date:
April 1, 1913
Creator:
Blackburn, Julian E.
System:
The Portal to Texas History
Septic Tank
Patent for Septic Tank for sewage disposal. This patent improves previous models, due to its easily instillation.
Date:
April 8, 1913
Creator:
Payne, George Ralph & Moore, Stewart
System:
The Portal to Texas History