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3 Matching Results
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Adjustable Friction-Grab for Fishing-Tools.
Patent for friction grabs for fishing tools in well drilling operations that can be "easily adjusted for different sized holes or wells and which will be automatically adjusted and the grabs automatically closed on the object to be removed" (lines 14-17).
Date:
May 24, 1921
Creator:
Dickson, Lawrence E.
System:
The Portal to Texas History
Folding Hay-Rake.
Patent for a hay rake that may have its working width considerably reduced when the machine is being conveyed to or from a field, including illustrations.
Date:
November 24, 1914
Creator:
Glenn, James R. & Glenn, Jesse, E.
System:
The Portal to Texas History
Convertible Neck Yoke and Swingletree
Patent for a convertible neck yoke and swingletree. Illustration included.
Date:
May 24, 1904
Creator:
Hall, Thomas I.
System:
The Portal to Texas History