EXHIBIT 4.12 AGREEMENT TO EXERCISE OR TERMINATE OPTION(S) This AGREEMENT TO EXERCISE OR TERMINATE OPTION(S) (the "Agreement") is made with reference to the following facts: A. The undersigned holds one or more options (the "Options") to acquire shares...Agreement to Exercise or Terminate Option(s) • April 18th, 2006 • Ats Medical Inc • Orthopedic, prosthetic & surgical appliances & supplies • California
