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Design for a Churn-Frame.

Description: Design patent for a churn frame.
Date: May 16, 1899
Creator: O'Marrow, Mattie
Partner: UNT Libraries Government Documents Department

Air Brake Lock

Description: Patent for an air brake lock. Illustrations included.
Date: May 16, 1905
Creator: Mabry, Davis L.
Partner: UNT Libraries Government Documents Department
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