1 Matching Results
Results open in a new window/tab.
Results:
1 - 1 of
1
Hydraulic Swivel.
Patent for a new type of swivel. This swivel allows for adjustments without removing any parts on the outside of the swivel. The parts are also made more simplistic and of stronger material.
Date:
August 3, 1909
Creator:
Layne, Mahon E. & Hall, Samuel N.
System:
The Portal to Texas History