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Automobile-Jack
Patent for an automobile jack that lifts the vehicle so that necessary repairs can be made and that relieves constant pressure of the tires.
Date:
January 18, 1916
Creator:
Davidson, Charles Edward
System:
The Portal to Texas History
Measuring Instrument for Curved Surfaces
Patent for Measuring Instrument for Curved Surfaces
Date:
December 5, 1916
Creator:
Mckinney, Elnathan J.
System:
The Portal to Texas History
Nut-Lock
Patent for a nut lock. Illustrations included.
Date:
February 15, 1910
Creator:
Davidson, Charles E. & Mauldin, Blake I.
System:
The Portal to Texas History