Trading Technologies International, Inc. v. BGC Partners, Inc.

IN THE UNITED STATES DISTRICT COURT NORTHERN DISTRICT OF ILLINOIS EASTERN DIVISION ) TRADING TECHNOLOGIES ) INTERNATIONAL, INC., ) ) Plaintiff ) No. 10 C 715 ) v. ) Judge Virginia M. Kendall ) IBG, LLC, et al. ) Defendants. ) MEMORANDUM OPINION AND ORDER TT accuses certain IBG products of infringing two of its patents—the ‘132 and ‘304 Patents—through the doctrine of equivalents. IBG argues the limitations of claim vitiation and prosecution history estoppel prevent application of the doctrine of equivalents to its products and moves for summary judgment accordingly. For the following reasons,…