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Process of Purifying Oil
Patent for using aluminum chlorid compounds to clean crude oil. Which is apart of the petrochemical process of oil purification.
Date:
August 5, 1919
Creator:
Miller, Albert E.
System:
The Portal to Texas History
Lawn Mower
Patent for a lawn mower in which the means for adjusting the intermediate blade has been created so that a groove for a predetermined depth can be cut, and easy removal of the blade when it is desired to sharpen the same. Additionally, a ground-engaging roller is included to keep the machine at the same level so that the knife will cut into the ground at an even depth.
Date:
December 5, 1919
Creator:
Coniglio Carmelo
System:
The Portal to Texas History