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Nut Lock.

Description: Patent for a keyed lock for nut and bolt that is removable and does not damage the threads.
Date: December 20, 1892
Creator: Crisp, James E.
Partner: UNT Libraries Government Documents Department

Gas Apparatus.

Description: Patent for certain new and useful improvements in apparatus for manufacturing gas from air and hydrocarbon, including instructions and illustrations.
Date: December 6, 1898
Creator: Gearing, Charles M.
Partner: UNT Libraries Government Documents Department
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