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Vehicle-Wheel
Patent for vehicle wheels/tires and meant to improve upon current models that contain too many operating parts. Patent also contains improvements in performance of tires relating to expansion and contraction of the tires due to temperature.
Date:
January 7, 1919
Creator:
Allan, William N.
System:
The Portal to Texas History
Etching Apparatus.
Patent for an etching device that is for those interested in producing copper and zinc half-tones. This device can also use wave like motion to retain highlight tones and finish half-tones without requiring re-etching or staging.
Date:
January 14, 1919
Creator:
Beare, John H.
System:
The Portal to Texas History