COBOTYX CORPORATION, INC.

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Patent Activity in the Last 10 Years

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4930153 PBX voice mail interfaceExpiredApr 07, 89May 29, 90[H04M]
4914690 Universal PBX interfaceExpiredApr 07, 89Apr 03, 90[H04M]
4885763 Voice mail system with improved detection and cancellationExpiredDec 01, 87Dec 05, 89[H04M]
4843620 Hand-held telephone line signaling test instrumentExpiredJun 29, 88Jun 27, 89[H04M]
4747126 Voice mail system on magnetic tapeExpiredFeb 27, 86May 24, 88[H04M]

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