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Cotton-Chopper (open access)

Cotton-Chopper

Patent for an improved type of cotton chopper that thins rows of plants on both flat and rough terrain. Includes illustrations and instructions.
Date: June 10, 1913
Creator: Hellums, Oscar S.
System: The Portal to Texas History
Thrust Bearing (open access)

Thrust Bearing

Patent for a thrust bearing. Illustration included.
Date: January 7, 1913
Creator: Johnston, Horace G.
System: The Portal to Texas History