TDC CORPORATION, THE

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6094437 Layer two tunneling protocol (L2TP) merging and managementExpiredFeb 19, 99Jul 25, 00[H04L]
5132926 Token ring equalizerExpiredSep 21, 90Jul 21, 92[H04L, H03D, G06G, H03H]
5090025 Token ring synchronizationExpiredJul 24, 90Feb 18, 92[H04L]

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