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Propeller
Patent for a boat propeller that does not create a vacuum behind it and is more efficient than other propellers.
Date:
July 23, 1912
Creator:
Blake, David H.
System:
The Portal to Texas History
Tax-Calculating Device
Patent for a tax calculating device that will calculate the percentages of the total tax that need to go to different agencies.
Date:
April 23, 1912
Creator:
Goss, George W.
System:
The Portal to Texas History