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4 Matching Results
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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
Object Type:
Patent
System:
The Portal to Texas History
Train-Order Holder.
Patent for Train-Order Holder designed to keep sheets of paper secure and in place to prevent writing on margins and displacement.
Date:
November 30, 1920
Creator:
Crady, Daniel R.
Object Type:
Patent
System:
The Portal to Texas History
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.
Object Type:
Patent
System:
The Portal to Texas History
Beaver Creek Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:31680
Date:
1920
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History