Automatic telephone calling card

Details Automatic telephone calling card Automatic telephone calling card

1993-03-18

1995-10-03

Hofsass, Jeffery A.

Telephonic communications

Supervisory or control line signaling

Substation originated

379354, 379357, 379356, 379112, H03M 127

Patent

active

054558573

ABSTRACT:
An automated calling card is provided having internal means for generating audible tones representative of a telephone number or calling card number to be dialed. A small, card-shaped unit houses a microprocessor or logic circuitry, including means for inputting data, memory, means for generating tones, a speaker and a display. Telephone numbers and information pertaining thereto can be stored into memory through use of a keypad on the card. A calling card number is also stored in memory. In use, audible tones representative of a telephone and/or calling card number desired to be dialed are generated by the card. Use of a Personal Identification Number prohibits unauthorized access to features of the card.

REFERENCES:
patent: 4126768 (1978-11-01), Grenzow
patent: 4868849 (1989-09-01), Tamaoki
patent: 4980910 (1990-12-01), Oba et al.
patent: 4995077 (1991-02-01), Malinowski
patent: 5119414 (1992-06-01), Izumi

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