Boll-Weevil Exterminator (open access)

Boll-Weevil Exterminator

Patent for removing dead bolls, insects and other parasites from growing plants.
Date: February 26, 1918
Creator: Harper, William E.
System: The Portal to Texas History
Pipe Lifting and Lowering Jack. (open access)

Pipe Lifting and Lowering Jack.

Patent for a pipe lifting and lowering jack that will hold pipes at various positions in wells.
Date: February 27, 1912
Creator: Smith, Thomas Monroe
System: The Portal to Texas History