A dedicated telephone dialer capable, in one embodiment, of automatically dialing a preprogrammed calling card abbreviated telephone number at one speed, waiting for a short period and then dialing a preprogrammed access number and, optionally, a preprogrammed personal identification number (PIN) at...http://www.google.de/patents/US5963637?utm_source=gb-gplus-sharePatent US5963637 - Telephone calling card dialer
