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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
Wagon-Tongue.
Patent for "new and useful Improvements in Wagon-Tongues, of which the following is a specification, reference being had therein to the accompanying drawings." (lines 6-9).
Date:
July 13, 1915
Creator:
Zimmer, Henry C.
System:
The Portal to Texas History
Fly-Trap.
Patent for an improvement to fly traps in which the flies are attracted by a sweet smelling substance down a funnel into the substance from which they are unable to escape. The flies either drown in the substance or are poisoned.
Date:
July 7, 1914
Creator:
Brown, Thomas E.
System:
The Portal to Texas History