UNT Libraries Government Documents Department - 5 Matching Results

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Trolley-Pole.

Description: Patent for a trolley pole, which attaches easily to the wire and can be placed on it by the operator without him leaving his station on the trolley.
Date: March 16, 1909
Creator: Barr, George T., Sr.

Cultivator

Description: Patent for a cultivator designed so that the plows can be conveniently set to any pitch as needed for deep or shallow plowing. Illustrations included.
Date: February 16, 1909
Creator: Miller, John T.

Mail-Bag Fastener.

Description: Patent for a mail bag fastener which automatically locks when closed and can only be opened with a key.It also holds the mail bag open when letters are being withdrawn.
Date: July 16, 1907
Creator: Barr, George Taylor