1
Michael E Diesel, Louis M Taff: Discretionary call forwarding. American Telephone and Telegraph Company AT&T Bell Laboratories, Ross T Watland, February 2, 1988: US04723273 (102 worldwide citation)

A call forwarding method that allows the called party to selectively forward individual alerting calls based, for example, on the calling party identity or on how busy the called party is at any given time, but without requiring the called party to first answer the calls. The called party can effect ...


2
James W Borchering, Louis M Taff: Method of discouraging the completion of wrong-number calls. American Telephone and Telegraph Company AT&T Bell Laboratories, Ross T Watland, November 1, 1988: US04782508 (15 worldwide citation)

A method of discouraging the completion of certain classes of calls including wrong-number calls. Incoming calls from calling parties not included on a customer-specified screening list are first connected to an appropriate advisory announcement. Such calls are advantageously not extended to the cus ...