EXHIBIT 10.1 STOCK PURCHASE AGREEMENT STOCK PURCHASE AGREEMENT, dated as of April 11, 2008, by and between INTEGRATED SURGICAL SYSTEMS, INC., a Delaware corporation (the "Company"), and the party set forth on the signature page hereto ("Purchaser")....Stock Purchase Agreement • May 20th, 2008 • Integrated Surgical Systems Inc • Surgical & medical instruments & apparatus • New York