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Adjustable Support.
Patent for adjustable props or supports used in concrete construction or scaffolding, including illustrations.
Date:
June 18, 1918
Creator:
Ware, Howard T.
System:
The Portal to Texas History
Valve-Spring Lifter.
Patent for valve spring lifter designed for use with internal combustion engines that holds the intake or exhaust valve springs in an elevated or rigid position. Illustrations included.
Date:
June 18, 1918
Creator:
Mountain, Thomas O.
System:
The Portal to Texas History