Resource Type
Counties
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Railroad-Signal
Patent for a railroad signal which will prevent train collisions at railway crossings, with illustrations.
Date:
February 17, 1920
Creator:
Humphrys, Sidney E.
System:
The Portal to Texas History
Pipe and Like Stem.
Patent for improved smoking equipment stems which prevents saliva from running down the stem. The end of the stem has a new design which extends upwards and then wraps forward and downward, leaving a slot where no saliva can enter.
Date:
February 22, 1921
Creator:
Crossman, Alvin Amos
System:
The Portal to Texas History