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Drafting Appliance

Description: Patent for the invention of improvements of drafting appliances.
Date: December 13, 1911
Creator: Blair, Oliver C.
Partner: UNT Libraries Government Documents Department

Automatic Car-Coupling.

Description: Patent for certain new and useful improvements in automatic car couplings, including instructions and illustrations.
Date: December 13, 1898
Creator: Pettes, Moses M.
Partner: UNT Libraries Government Documents Department

Valve-Cleaner.

Description: Patent for a valve cleaner to remove carbon from the internal combustion motors in automobiles. It can be used without removing the valve or motor.
Date: December 13, 1921
Creator: Henderson, Daniel D.
Partner: UNT Libraries Government Documents Department

Process of Making Bearings

Description: Patent for the process of making bearings, for improvement of bearings and the process of bearing formation on the interior of rotary members (or rotary cutters used on earth boring drills).
Date: December 13, 1921
Creator: Fletcher, Harold W.
Partner: UNT Libraries Government Documents Department

Animal-Trap

Description: Patent for an animal trap with a new kind of trigger fir closing the door to the trap.
Date: December 13, 1910
Creator: Hatchell, Benjamin
Partner: UNT Libraries Government Documents Department
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