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3 Matching Results
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Automatic Air Controlling Device
Patent for an air controlling device that supplies air at a constant and unvarying pressure.
Date:
February 22, 1916
Creator:
Crotto, Frank E.
System:
The Portal to Texas History
Clutch and Transmission Device
Patent for new and useful improvements in the development of clutch and transmission devices.
Date:
February 22, 1921
Creator:
Hubbard, Adra M.
System:
The Portal to Texas History
Screen Fastener
Patent for the attachment method for wire screens to a frame to prevent the detachment of the wire screen from the frame.
Date:
February 22, 1921
Creator:
McCaffrey, Horace
System:
The Portal to Texas History