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Reciprocating Valve.

Description: Patent for a reciprocating valve. This valve is adapted for use with air, gases, or liquids.
Date: March 14, 1916
Creator: Bean, Cecil
Partner: UNT Libraries Government Documents Department

Flue-Cutter

Description: Patent for a flue cutter with a pair of pivoted arms, which can be detached, and a cutter-head.
Date: January 14, 1890
Creator: Bogusch, Robert J.; Zincke, August & Bogusch, Gustav
Partner: UNT Libraries Government Documents Department
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