Resource Type
Counties
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Calk Attachment For Horseshoes
Patent for new and useful improvements in calk attachments for horseshoes. The objective is to provide detachable means applicable to the conventional types of shoe without any modifications.
Date:
March 29, 1921
Creator:
Douglas, John Davies
System:
The Portal to Texas History
Friction Transmission Mechanism.
Patent for improvements toward friction transmission mechanisms. It would eliminate the use of some gears.
Date:
March 28, 1921
Creator:
McDermott, Henry
System:
The Portal to Texas History
Toy Aeroplane.
Patent for a new and improved toy airplane to be propelled by the feet and steered by the child seated inside, including illustrations. It "is relatively simple and inexpensive to produce, while also being able to withstand considerable rough handling" (lines 26-28).
Date:
March 15, 1921
Creator:
Paul, Leon R.
System:
The Portal to Texas History