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Life-Preserver.

Description: Patent for life preserver worn on the human body and inflated with a valve attached to rubber tubes. Includes illustration.
Date: July 30, 1901
Creator: Graham, George
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Oil Well Drill.

Description: Patent for a new rotary oil drill with improvements to anchor the drill-pipe, improve oil flow, and prevent blow-outs of the drill-pipe.
Date: July 3, 1903
Creator: Decker, Harry R.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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