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Lifting-Jack.
Patent for a mechanical device improvements to lift heavy loads or to apply great forces.
Date:
April 29, 1913
Creator:
Graves, James M.
System:
The Portal to Texas History
Paper-Perforating Device.
Patent for "a combined gripper-bar and perforator for use on printing-presses." (Lines 8-9) Includes instructions and illustrations.
Date:
September 15, 1890
Creator:
Wells, William F.
System:
The Portal to Texas History