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

Daniel R. Kranzler

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Computer controlled paging and telephone communication...

Telephonic communications – Audio message storage – retrieval – or synthesis
Reexamination Certificate

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Enhanced call waiting

Telephonic communications – Special services – Call waiting
Patent

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Enhanced call waiting

Telephonic communications – Special services – Call waiting
Patent

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Profile ID: LFUS-PAI-P-444000

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