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Cultivator.

Description: Patent for a cultivator that has an improved method of attaching a harrow to the cultivator.
Date: February 7, 1911
Creator: Kelly, Robert Marvin
Partner: UNT Libraries Government Documents Department

Automatic Safety Attachment for Air-Brakes

Description: Patent for an automatic safety attachment for air brakes that can be attached to trains and automobiles. Illustrations included.
Date: April 11, 1911
Creator: Hamilton, Ernest Hubbard
Partner: UNT Libraries Government Documents Department

Gas-Exploded Ordnance

Description: Patent for a gas gun. Illustrations included.
Date: May 30, 1911
Creator: Hamilton, Ernest Hubbard
Partner: UNT Libraries Government Documents Department
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