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Drill-Bit
Patent for new improvement in drill-bits. The object of the invention is to "provide the driller with advanced knowledge of the formation into which he is about to extend his main hole".
Date:
January 11, 1921
Creator:
Smith, Primus W.; Bookhout, John J. & Monce, Edwin W.
System:
The Portal to Texas History
Game.
Patent for a board game based on finance. The board game uses numbered discs that players own multiple quantities of that indicate their positions on the board.
Date:
January 11, 1921
Creator:
Sterling, Don L.
System:
The Portal to Texas History