Exhibit 10.29 MATRIDIGM CORPORATION PREFERRED STOCK PURCHASE AND PUT OPTION AGREEMENT INTRODUCTION This Preferred Stock Purchase and Put Option Agreement (this "Agreement") is made as of December 2, 1996 (the "Effective Date") by and among MatriDigm...Preferred Stock Purchase and Put Option Agreement • February 12th, 1997 • Zitel Corp • Patent owners & lessors • California
