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

Shuji Fujitsuka

Inventor

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Private electronic exchange apparatus having a plurality of exte

Telephonic communications – Special services – Call diversion
Patent

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Telephone exchange apparatus

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Telephone exchange apparatus

Telephonic communications – Emergency or alarm communications – Central office responsive to emergency call or alarm
Reexamination Certificate

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Profile ID: LFUS-PAI-P-443994

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