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Trolley-Harp.
Patent for improvements to the efficiency of trolley harps by changing how the currents that power "overhead type electric car systems" (lines 13-14) are conducted.
Date:
May 15, 1917
Creator:
Carmack, James H.
System:
The Portal to Texas History
Peanut Digger.
Patent for new and useful improvements to a machine for harvesting or digging peanuts, including instructions and illustrations.
Date:
May 15, 1917
Creator:
Amos, Thomas E. & Abernathy, George J.
System:
The Portal to Texas History