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Aeroplane.
Patent for an airplane (or aeroplane) which provides a large number of control surfaces adjustable by the pilot, including a moveable engine.
Date:
January 7, 1919
Creator:
Millican, Joel Walter
System:
The Portal to Texas History
Automatic Gas Control for Gas Water-Heaters.
Patent for an automatic control for instantaneous water heaters to control a supply of water and simultaneously an automatic supply of gas to the heater.
Date:
October 7, 1919
Creator:
Hamilton, Paul H.
System:
The Portal to Texas History