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Axle Lubricator.
Patent for axle lubricator. This invention makes it so that manual lubrication of spindles is eliminated.
Date:
November 15, 1921
Creator:
Bass, Thomas G.
System:
The Portal to Texas History
Vacuum-Operated Make-And-Break Spark Plug
Patent for an improved "vacuum operated make and break spark plug" (lines 16-17) including illustrations.
Date:
November 19, 1918
Creator:
Irwin, Herbert G.
System:
The Portal to Texas History