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Interliner for Tires

Description: Patent for a liner that goes inside of an inner tube that is inside of a pneumatic tire. The device works to help slow flats in tires and improve the structure of a tire.
Date: October 7, 1919
Creator: McDonald, John P.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Supporting-Shelf.

Description: Patent for a supporting shelf specifically for clocks. The supporting shelf keeps the clock balanced.
Date: November 3, 1914
Creator: McDonald, John A..
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Rail-Joint

Description: Patent for a rail joint that is new and improves already existing rail joints specifically scarf joints.
Date: October 26, 1920
Creator: McDonald, John A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Improvement in Policemen's Batons.

Description: Patent for an improved policemen's baton made of flexible material, such as india-rubber or gutta-percha, and sometimes an interior metal stem. Using a flexible material makes the baton elastic enough so that no serious injury can be caused, yet it is still effective. Illustration included.
Date: October 14, 1873
Creator: Beery, Simon & McDonald, John W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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