141 131 http://www.freepatentsonline.com/index.html http://www.freepatentsonline.com/images/logo.gif http://www.freepatentsonline.com/result.html?query_txt=ccl/431%20and%20isd/11/03/2009&uspat=on USPTO Class 431 Combustion en-us Thu, 05 Nov 2009 03:35:23 EST http://www.freepatentsonline.com/7611351.html Tue, 03 Nov 2009 08:00:00 EST