Exhibit 4 NORWOOD VENTURE CORP. May 13, 2004 Mr. Christopher Coccio, CEO Sono- Tek Corporation 2012 Route 9W, Building 3 Milton, NY 12547 Subject: Note and Warrant Purchase Agreement dated September 29, 1999 (the "Agreement"), as amended and the 12%...Note and Warrant Purchase Agreement • July 8th, 2004 • Sono Tek Corp • Miscellaneous electrical machinery, equipment & supplies
