MEMORANDUM AND ORDER
ANITA B. BRODY, District Judge.
In this patent infringement action, Plaintiffs A. Nattermann & Cie GmbH ("Nattermann") and Aventis Behring L.L.C. bring suit against Defendants Bayer Corporation and Bayer Healthcare LLC for alleged infringement of U.S. Patent No. 5,565,427 ("the '427 patent"). Defendants bring counterclaims against Plaintiffs and Counterclaim Defendant Aventis Behring GmbH.
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