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Concrete Building-Block.

Description: Patent for concrete building blocks, intended for use in the building of smaller structures, which are strong, easily assembled, and light weight.
Date: December 27, 1921
Creator: McEwen, James R.
Partner: UNT Libraries Government Documents Department

Process of Making Bearings

Description: Patent for the process of making bearings, for improvement of bearings and the process of bearing formation on the interior of rotary members (or rotary cutters used on earth boring drills).
Date: December 13, 1921
Creator: Fletcher, Harold W.
Partner: UNT Libraries Government Documents Department
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