Patent also granted in Australia AU 2001230648 (B2) 2006-07-13, in the U.S. US 7801781 (B2) 2010-09-21 and by division US 8229813 (B2) 2012-07-24, in China CN 101789868 (B) 2012-12-12 and in Japan JP 5301689 (B2) 2013-09-25. International application WO 02/ 28026 (A1) 2002-04-04.