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[12] [13] Mated connectors in Scribner's patent 489,570 filed on December 27, 1880 Henry P. Clausen's 1901 patent. Charles E. Scribner filed a patent [14] in 1878 to facilitate switchboard operation using his spring-jack switch. In it, a conductive lever pushed by a spring is normally connected to one contact. But when a cable with a conductive ...