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Wireless Break-Key

Description: Patent for a wireless break key that allows a station to just have one aerial line and prevents burn out of the machinery and injury to operators while transmitting messages faster than other wireless devices.
Date: December 31, 1912
Creator: Mobley, Grier P.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Telephone-Call Recorder

Description: Patent for a telephone call recorder that allows the number of who is calling to be recorded when the phone is not answered and tell a person already on the phone who is trying to call them.
Date: October 15, 1912
Creator: Warwick, Harold L.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department

Electric Switch.

Description: Patent for switches or connectors that connect sections of wires used for telephones or telegraphs
Date: January 9, 1912
Creator: Du Val, James Erl & Lee, Ezra A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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