Freeborn & Peters LLP added David M. Knapp and D. Richard Self as associates. Knapp, a intellectual property practice group member in the Chicago office, focuses on intellectual property enforcement and defense and IP portfolio management.He joins from Wilson, Sonsini, Goodrich & Rosati P.C.Self, a member of the litigation and government and regulatory law practice groups in both the Chicago and Springfield offices, focuses on complex commercial litigation, appellate litigation, antitrust and government …