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Casing Spear
Patent for casing spears. This invention is designed for pulling well tubes or casings that have broken off out of the well. Illustration included.
Date:
August 25, 1908
Creator:
Carroll, Monroe W. & Johnston, H. G.
System:
The Portal to Texas History
Mowing Machine
Patent for various refinements in mowing machines.
Date:
August 25, 1914
Creator:
Caruthers, Edgar
System:
The Portal to Texas History
Pumping Apparatus.
Patent for pumping apparatus. This invention provides a means to elevate liquids by use of compressed air. It is specifically intended for deep oil-wells.
Date:
August 25, 1903
Creator:
Cain, Francis Charles & Herrenkind, Oscar Charles
System:
The Portal to Texas History
Piano Key Bushing.
Patent for an improved piano key bushing that designed to reduce sticking of the keys. Important parts of the bushing are made of metal and given ample room to expand without causing friction that might cause the keys to stick.
Date:
August 25, 1914
Creator:
Rogers, Karl C.
System:
The Portal to Texas History