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Concrete Form.
Patent for a circular concrete form. The form is adjustable and allows nesting for storage and transport.
Date:
October 17, 1922
Creator:
Harris, John W.
System:
The Portal to Texas History
Gasoline Purifier
Patent for improved Gasoline-Purifiers, based off of prior models.
Date:
January 10, 1920
Creator:
Harris, Ward Rolland
System:
The Portal to Texas History