4. Telephonic communications
  5. Multi-line or key substation system with selective switching...
  6. Line status indication or call alerting

Douglas C. Oddy

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Palm PC dockable phone

Telephonic communications – Composite substation or terminal
Reexamination Certificate

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Solid state trunk circuit

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

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Telephone line status circuit

Telephonic communications – Multi-line or key substation system with selective switching... – Line status indication or call alerting
Patent

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Profile ID: LFUS-PAI-P-1231316

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