Mr. Maddock practices all aspects of intellectual property litigation, including trade secrets and copyright litigation, with an emphasis on patent and trademark litigation. His practice also includes intellectual property due diligence for transactional matters and freedom to operate opinions. He is an approved mediator for intellectual property cases in the Eastern District of Missouri.

Mr. Maddock is a member of the Missouri Bar, Illinois State Bar, Bar Association of Metropolitan St. Louis and the Intellectual Property Owners Association.

• Insituform Technologies, Inc. et al v. AMerik Supplies, Inc. et al., Case No. 1:2008-cv-00333 (N.D. Ga.). While lead counsel representing Insituform, obtained a default judgment against defendant Cosmic Sondermaschinenbau GmbH for repeated violations of Court Orders. Obtained a sanction of $441,000 for attorneys' fees necessary to cure repeated discovery violations and to oppose unfounded motion
• Insituform Technologies, et al v. Cat Contracting, et al., 4:1990-cv-01690 (S.D. Tx.). As lead counsel for Insituform in a patent infringement suit, Mr. Maddock tried damages to the court resulting in a judgment of $9.6 million for Insituform. Case subsequently settled favorably for Insituform
• Nutrinova Nutrition Specialties & Food Ingredients GmbH v. The Ingredient House, LLC et al., Case No. 1:07-cv-4232 (N.D. Ill.). Represented plaintiff in a patent infringement suit where the patent covered an intermediary by-product in the manufacturing process. The primary patents had expired. Defendant was owned by former Nutrinova executives, and settled with Nutrinova on favorable terms
• Valley Entertainment Inc. v. Friesen et al., 1:2008-cv-03470 (N.D. Il.). Lead counsel representing defendant in a copyright infringement suit for infringement of certain music. Won summary judgment of non-infringement. Attorneys' fees awarded
• Enterprise Rent-A-Car Company v. U-Haul International, Inc., 4:2003-cv-01480 (E.D. Mo.). Lead counsel who represented Enterprise in a trademark infringement action that alleged that U-Haul's "eMove" mark infringed Enterprise's "e" trademark. Case settled favorably for Enterprise
• Illinois Tool Works Inc. et al. v. Thermal Dynamics Corp., 1:2003-cv-00966 (E.D. Wi.). Lead counsel responsible for defending Thermal Dynamics Corp. in a patent infringement suit concerning power supplies for welders. Case ended favorably
• CIMA Labs Inc., et al. v. KV Pharmaceutical Co., et al., 0:2003-cv-02477 (D. Minn.). Represented KV in a patent infringement suit and defeated motion for preliminary injunction. After KV filed requests for reexamination of the patents, CIMA requested that the Court stay the case. The case remains stayed pending the results of the reexaminations. The patent claims were recently found invalid in the reexamination by the Board of Patent Appeals and Interferences, but is not yet final
• Prosecuted In re Certain Low Antimony Phosphoric Acid, Inv. No. 337-TA-620, as lead counsel on behalf of ICL Performance Products, LP (St. Louis, Missouri) (“ICL”). The complaint alleged the importation and the sale within the United States of certain low antimony phosphoric acid infringed certain claims of U.S. Patent No. 5,989,509. ICL favorably settled the matter
• The GSI Group, Inc. v. Sukup Mfg. Co., Case No. 05-3011 (C.D. Il.). Cross-examined lead witness for GSI on behalf of Sukup, and defended against GSI's allegations of false advertising. Witness for GSI, during cross-examination, admitted that GSI's own advertising was false under GSI's theory of the case. Case settled favorably for Sukup shortly after this cross-examination

Mr. Maddock coaches youth basketball.