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Air-Lift Pump
Patent for an air lift pump. Illustrations included.
Date:
July 30, 1912
Creator:
Holmgreen, Julius H. & Underwood, William H.
System:
The Portal to Texas History
Internal Combustion Engine.
Patent for improved internal combustion engine design that replaces puppet valves with slide valves to increase port area and speed, while reducing noise. Includes illustrations.
Date:
July 9, 1912
Creator:
Garfield, George M.
System:
The Portal to Texas History
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
Fish-Trap
Patent for a fish trap. Illustrations included.
Date:
July 23, 1912
Creator:
Calvert, Walter Riley
System:
The Portal to Texas History