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Improvement in Rotary Cultivators.
Patent for a machine for "opening ditches to drain land and form fences, and to grade railroads, &c." (lines 15-17) including illustrations and instructions.
Date:
October 10, 1876
Creator:
Tadlock, Sevier
System:
The Portal to Texas History
Triple Valve for Fluid-Pressure Brakes.
Patent for a triple valve for fluid-pressure brakes in trains that prevents accidental triggering of the emergency brakes.
Date:
October 10, 1911
Creator:
Robinson, John W. & Douglas, Frank L.
System:
The Portal to Texas History