×

Cellular telephone calling system using credit card validation

  • US 5,550,897 A
  • Filed: 11/08/1994
  • Issued: 08/27/1996
  • Est. Priority Date: 09/25/1992
  • Status: Expired due to Fees
First Claim
Patent Images

1. A cellular telephone calling system with a credit card call accounting and billing component, said cellular telephone calling system including a plurality of cellular telephones wherein users charge cellular telephone calls to credit cards, each said cellular telephone having access to a telecommunications network including a cellular telecommunications component and a credit card verification component comprising:

  • a cellular telephone having a handset and a transceiver unit coupled together via a communications bus, said communications bus carrying audio transmission signals, audio receive signals, data transmission signals and data receive signals between said handset and said transceiver unit, said handset adapted to accept a destination telephone number from said user as part of initiating a telephonic communications link with a telephonic device corresponding to said destination telephone number;

    a credit card interface unit coupled to said communications bus, said interface unit having means for selectively monitoring, blocking, modifying and passing said audio transmission signals, audio receive signals, data transmission signals and data receive signals between said handset and said transceiver unit;

    a credit card data input device coupled to said interface unit;

    as part of said interface unit;

    means for blocking all said audio transmission signals, audio receive signals, data transmission signals and data receive signals except emergency signals until said user inputs his or her credit card data into said card data input device;

    means for inserting a predetermined call placement telephone number into at least one of said audio transmission signals and data transmission signals along with said credit card data and said destination telephone data and for sending such data and signals to said telecommunications network via said transceiver and said communications bus;

    said telecommunications network having;

    a network transceiver associated with said call placement telephone number, said network transceiver receiving said credit card data and said destination telephone data from said cellular telephone transceiver and having means for ascertaining the validity of said credit card data with said credit card verification component before completion of said telephonic communications link between said cellular telephone and said telephonic device corresponding to said destination telephone number.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×