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Pipe Tongs.
Patent for pipe tongs for drilling wells using rotary systems. The tongs are designed to be securely held against the drill stem using a lever, making them simple and economical to manufacture.
Date:
June 28, 1921
Creator:
Hill, Richard D.
System:
The Portal to Texas History
Pneumatic Cushioned Tire.
Patent for improvements to pneumatic cushioned tires, including guards to protect and shield the sides against abrasion.
Date:
June 28, 1921
Creator:
Kerr, Augustus Hallawell; Smith, J.A.; Atkinson, J. M.; Dacus, J.A. & Coley, W.L.
System:
The Portal to Texas History