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Telephone Signal

Description: Patent for a telephone signal. This invention relates to electrically operated signals whereby a visual signal for indicating when a telephone rings. Illustration included.
Date: December 11, 1906
Creator: Jordan, Thomas P. & Carden, George A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Trolley-Pole.

Description: Patent for trolley-poles for electric cars which provides "a simple, inexpensive, and highly efficient trolley-wire finder, and one which is readily applicable to trolley-poles such as at present in use and is adapted to be quickly and easily raised to an operative position and when released is adapted to gravitate to a position below and out of the way of the trolley-wire" (lines 15-22).
Date: December 11, 1900
Creator: Schroeter, William & Kautzmann, August
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Telephone System.

Description: Patent for, "telephone system; and it has for one object to provide such an arrangement of the instrument and wiring as will permit a subscriber to converse with a second subscriber" (lines 8-12).
Date: December 11, 1900
Creator: Bennett, William W.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Phantom Telephone System

Description: Patent for phantom telephone system. This invention is a system of transmission of electrical energy for telephones to produce telephone circuits more economically. Illustrations included.
Date: December 11, 1906
Creator: Jordon, Thomas P.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Drum-Lining.

Description: Patent for a cement pulverizer drum made of cast iron with a tongue and groove connection that is strong, durable, and easy to make.
Date: December 11, 1917
Creator: Johnson, Charles L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Doubletree.

Description: Patent for a simple, inexpensive, and durable double tree that utilizes the entire force of the strain and divides it equally between the animals.
Date: December 11, 1894
Creator: Beaver, Francis Marion
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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