| http://www.w3.org/ns/prov#value | - rcuit in which station ground is isolated from the circuit except during signaling from the central officeUS3944717Aug 15, 1973Mar 16, 1976Western Electric Company, Inc.Flame-retardant, water-resistant composition and coating transmission member therewithUS4028494May 17, 1976Jun 7, 1977Bell Telephone Laboratories, IncorporatedEscrow telephone coin collection circuit and methodUS4169216May 8, 1978S
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