United Networks, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4410765 Telephone call routing and charging systemExpiredJun 04, 81Oct 18, 83[H04M]
4400589 Subscriber station networkExpiredJul 13, 81Aug 23, 83[H04M]
4346261 Speaker phonesExpiredMar 17, 80Aug 24, 82[H04M]
4314107 Subscriber station networksExpiredDec 26, 79Feb 02, 82[H04M]
4303805 Subscriber station networkExpiredMay 21, 79Dec 01, 81[H04M]
4232200 Dialing systemExpiredOct 23, 78Nov 04, 80[H04M]

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