As the House Judiciary Committee launched expedited hearings on a comprehensive patent reform bill on Tuesday, the former director of the U.S. Patent and Trademark Office had a different message: “Proceed with caution.”

David Kappos, now a partner at Cravath, Swaine & Moore’s New York office, warned during a committee hearing that the Innovation Act, introduced last week, comes just two years after the Leahy-Smith America Invents Act and “writes on a page whose ink is barely dry.”