MEMORANDUM AND ORDER
LEE H. ROSENTHAL, District Judge.
TIP Systems, Inc. and TIP Systems Holding Co. ("TIP Systems") sued SBC Operations, Inc., Securus Technologies, Inc., Conversant Technologies, Inc., AT & T Corporation, TCG Public Communications, Inc., and John D. Profanchik, alleging patent infringement. TIP Systems holds United States Patent No. 6,009, 169 (the "`169 patent") and United States Patent No. 6, 152, 828 (the "`828 patent"). The '169...
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