Exhibit 4.1 FOURTH AMENDMENT TO RIGHTS AGREEMENT This Fourth Amendment, dated as of November 10, 2009 ("Amendment"), and effective as of the date set forth below, amends that certain Rights Agreement, dated as of December 20, 1994 (as amended, "Rights...Rights Agreement • November 12th, 2009 • Rf Monolithics Inc /De/ • Radio & tv broadcasting & communications equipment • Delaware
