4. Telephonic communications
  5. Special services
  6. Repetitive call attempts

David Alan Vander Meiden

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Proximity detector for initiating automatic callback

Telephonic communications – Special services – Repetitive call attempts
Reexamination Certificate

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System and method for early detection of area code changes

Telephonic communications – Supervisory or control line signaling – Substation originated
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2586449

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