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Home › Voice, data and facsimile modem with modified ringback answering

Voice, data and facsimile modem with modified ringback answering

US Patent 5440619 · Granted Aug 8, 1995

Estimated economic value: $1,159,000 ⓘ

Assignee

Zoom Telephonics

Inventors

Peter Edward Cann (2 patents)

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