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Door-Fastener

Description: Patent for a portable door fastener that can be used to lock hotel doors. Illustrations included.
Date: August 23, 1910
Creator: Mellott, Judson R.
Partner: UNT Libraries Government Documents Department

Derrick

Description: Patent for a derrick. Illustration included.
Date: April 3, 1906
Creator: McClain, Thomas & McDaniel, Robert S.
Partner: UNT Libraries Government Documents Department
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