4. Telephonic communications
  5. Diagnostic testing, malfunction indication, or electrical...
  6. Of trunk or long line

Robert Levy

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Method and apparatus for facilitating the making of card calls

Telephonic communications – With usage measurement – Call charge metering or monitoring
Patent

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Method for initiating a telephone call on a remote line

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line
Patent

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Profile ID: LFUS-PAI-P-1722789

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