Doctrine of Equivalents

CBOE v. ISE, No. 07 C 623, Slip Op. (N.D. Ill. Mar. 6, 2013) (Lefkow, J.).

Judge Lefkow granted in part plaintiff CBOE’s motion to strike defendant ISE’s expert witness in this patent case, as follows:

  • This case was not governed by the Local Patent Rules (“LPR”) because it was filed before the LPR