Antileak Composition. (open access)

Antileak Composition.

Patent for improvements in antileak composition in order to prevent leaks in liquid holding containers like radiators, boilers, etc.
Date: July 5, 1921
Creator: Shrum, Will N.
System: The Portal to Texas History
Collar Fastener and Supporter (open access)

Collar Fastener and Supporter

Patent for an object that provides the collar support and is hidden.
Date: July 19, 1921
Creator: Hudson, George J.
System: The Portal to Texas History
Traffic Signal System (open access)

Traffic Signal System

Patent for a Traffic Signal System for universal traffic management, i.e. automobiles, pedestrians, railway, street car, etc. The system has a warning signal to indicate danger and designate a safety zone. This system provides an audible as well as visual signal.
Date: July 21, 1921
Creator: Wetter, R. E.
System: The Portal to Texas History
Game-Board. (open access)

Game-Board.

Patent for a game board that includes barriers, inclines, and depressions in the board which is meant to simulate a game similar to baseball (as well as other games) using a cue ball. The game board also comes with auxiliary barriers to adjust gameplay.
Date: July 12, 1921
Creator: Sterling, Don L.
System: The Portal to Texas History
Paving Apparatus. (open access)

Paving Apparatus.

Patent for "a device or apparatus for transmitting the vibrations of a vibrating machine...for the purpose of solidifying the paving by driving out air and water and surplus moisture" (lines 12-18), including illustration.
Date: July 5, 1921
Creator: Stubbs, Robert C.
System: The Portal to Texas History