4. Telephonic communications
  5. Special services
  6. Call waiting

Walter J. Slegers

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Digital communication system, a communication station for use in

Pulse or digital communications – Transceivers
Patent

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Telecommunication station with call blocking and call transferri

Telephonic communications – Call or terminal access alarm or control – At substation
Patent

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Telecommunication system intruding on a busy called party

Telephonic communications – Special services – Call waiting
Patent

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Terminal

Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Patent

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Profile ID: LFUS-PAI-P-592939

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