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Drill Bit
Patent for drill bit, adapted for use in boring (or drilling) of oil wells with bit shank and enlarged head of angularly mounted rotary cutters (for outward cutting of well walls).
Date:
January 3, 1922
Creator:
Thomas, Martin E.
System:
The Portal to Texas History
Hand Harvester.
Patent for a hand harvester that contains a plate and cutter to be used for harvesting corn and maize with more ease.
Date:
August 17, 1920
Creator:
Taylor, Joseph S.
System:
The Portal to Texas History
Dirigible Headlight for Vehicles.
Patent for dirigible headlight for vehicles where the headlights are adapted to turn with the steering of the vehicle, or may be manually deflected independently of the vehicle steering.
Date:
November 30, 1920
Creator:
Poindexter, Franklin E.
System:
The Portal to Texas History