4. Telephonic communications
  5. Plural exchange network or interconnection
  6. Interexchange signalling

Sakari Pernu

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Method and a system for transmitting alarms

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Monitoring
Reexamination Certificate

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Method and system for implementing a service in a...

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Reexamination Certificate

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Method and system for implementing a service in a...

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
Reissue Patent

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Profile ID: LFUS-PAI-P-2218121

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