Measuring Instrument for Curved Surfaces (open access)

Measuring Instrument for Curved Surfaces

Patent for Measuring Instrument for Curved Surfaces
Date: December 5, 1916
Creator: Mckinney, Elnathan J.
Object Type: Patent
System: The Portal to Texas History
Automobile-Jack (open access)

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
Object Type: Patent
System: The Portal to Texas History
Nut-Lock (open access)

Nut-Lock

Patent for a nut lock. Illustrations included.
Date: February 15, 1910
Creator: Davidson, Charles E. & Mauldin, Blake I.
Object Type: Patent
System: The Portal to Texas History

Sherwood Sheet

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 1:125000
Date: 1910
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History