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

Hiromi Katagawa

Inventor

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Electronic apparatus

Static information storage and retrieval – Floating gate – Particular connection
Reexamination Certificate

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Private branch exchange

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

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Telephone-call distributor

Telephonic communications – Special services – Reserved call
Patent

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Profile ID: LFUS-PAI-P-99871

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