4. Telephonic communications
  5. Private or single line system
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Method and apparatus for broadcasting audio in a...

Telephonic communications – Private or single line system – With paging
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Method and apparatus for communication with a gate entry...

Telephonic communications – Private or single line system – Doorbell system
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Method and apparatus for identifying the source of page communic

Telephonic communications – Private or single line system – With paging
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Method and apparatus for installing telephone intercom--voice me

Telephonic communications – Private or single line system – Doorbell system
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Method and apparatus for installing telephone intercom-voice mes

Telephonic communications – Private or single line system – Doorbell system
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Method and apparatus for subscriber line to telephone call...

Telephonic communications – Private or single line system – Having plural stations with selective calling
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Method and device for access communication/control

Telephonic communications – Private or single line system – Doorbell system
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Method for influencing a signaling procedure with the assistance

Telephonic communications – Private or single line system – Doorbell system
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Method of establishing communication link to one of multiple dev

Telephonic communications – Private or single line system – Doorbell system
Patent

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Methods and apparatus for requesting assistance at a...

Telephonic communications – Private or single line system – At booth
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Methods and systems for communication from an exterior of a...

Telephonic communications – Private or single line system
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Multifunctional intercom system with message...

Telephonic communications – Private or single line system
Reexamination Certificate

  [ 0.00 ] – not rated yet Voters 0   Comments 0
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