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Hot-Air Mixer
Patent for a device that will create hot air to be delivered to the manifold of gas-powered engines in motor vehicles when the operator pushes a plunger that will open an intake valve.
Date:
March 9, 1920
Creator:
Ingraham, Jerome H.
System:
The Portal to Texas History
Quick-Adjustable Wrench.
Patent for a quick-adjustable wrench "of novel and improved construction, as well as being thoroughly practical and efficient in use" (lines 10-14), including illustrations.
Date:
June 20, 1920
Creator:
Shoopman, Andrew
System:
The Portal to Texas History