Exhibit 4.1 NORWEST-BANK MINNESOTA CREDIT AGREEMENT NATIONAL ASSOCIATION THIS CREDIT AGREEMENT (the "Agreement") dated as of October 13, 1997 (the "Effective Date") is between Norwest Bank Minnesota, National Association (the "Bank") and Research,...Credit Agreement • December 12th, 1997 • Research Inc /Mn/ • Industrial process furnaces & ovens • Minnesota
