4. Telephonic communications
  5. Emergency or alarm communications

David A. Vander Meiden

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Method and apparatus for routing blocked telephone calls

Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Testing of subscriber loop or terminal
Reexamination Certificate

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Methods and apparatus for dialing an emergency telephone...

Telephonic communications – Emergency or alarm communications
Reexamination Certificate

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Methods and apparatus for transmitting accurate emergency...

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

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Network group pickup

Telephonic communications – Centralized switching system – Call distribution to operator
Reexamination Certificate

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Partitioning of display for calling party numbers

Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2990786

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