Missouri Revised Statutes Title XXVI. Trade and Commerce § 416.658. Other remedies not limited--inapplicability of act, when

1. Sections 416.650 to 416.658 shall not be construed to limit the rights or remedies available to any person or the state under any other law with regard to conduct involving assertions of patent infringement provided that it shall not be an unfair or deceptive trade practice for any person who owns or has the right to license or enforce a patent to notify another of that ownership or right of license or enforcement, to notify another that the patent is available for license or sale, to notify another of the infringement of that patent under the provisions of Title 35 of the United States Code, or to seek compensation on account of a past or present infringement, or for a license, when it is reasonable to believe that the person from whom compensation is sought may owe such compensation.

2. The provisions of sections 416.650 to 416.658 shall not apply to a demand letter or assertion of patent infringement that includes a claim for relief arising under 35 U.S.C. Section 271(e)(2) or 42 U.S.C. Section 262.