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Delayed cancel call waiting

Telephonic communications – Special services – Call waiting
Patent

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Distinctive call waiting alert and management device

Telephonic communications – Special services – Call waiting
Reexamination Certificate

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Dynamic call response system

Telephonic communications – Special services – Call waiting
Reexamination Certificate

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Dynamic call waiting based on caller ID

Telephonic communications – Special services – Call waiting
Reexamination Certificate

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