EXHIBIT 10.4 JENNER TECHNOLOGIES NOTE PURCHASE AGREEMENT This Agreement is made as of May 6, 1996 between Jenner Technologies, a California corporation (the "Company") and Hayden Leason (the "Investor"). 1. The Note. 1.1 The Notes. The Investor...Jenner Technologies Note Purchase Agreement • February 19th, 1997 • Jenner Technologies • California
