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Public modular-telephone management system

  • US 5,138,648 A
  • Filed: 04/12/1991
  • Issued: 08/11/1992
  • Est. Priority Date: 04/19/1990
  • Status: Expired due to Term
First Claim
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1. A public modular management system, comprising:

  • a variable number of public modular telephones;

    validation and identification units of public modular telephones;

    adaptation units of public modular telephones;

    an operation system of public modular telephones on a provincial scale;

    a center of validation and billing of credit cards and telephone subscriber cards;

    a variable number of maintenance units of the validation and identification units of public modular telephones;

    wherein said elements are framed in a hierarchical structure on a provincial and national scale, carrying out functions in real time.

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