freepatentsonline.com 141 131 http://www.freepatentsonline.com/ http://www.freepatentsonline.com/images/logo.gif Free Patents Online: Combustion http://www.freepatentsonline.com/rssfeed/rsspat431.xml USPTO Class 431 Combustion en-us Tue, 07 Feb 2012 08:00:00 EST <![CDATA[Ignitor safety interlock and torch]]> http://www.freepatentsonline.com/8109760.html Tue, 07 Feb 2012 08:00:00 EST <![CDATA[Assured compliance mode of operating a combustion system]]> http://www.freepatentsonline.com/8109759.html Tue, 07 Feb 2012 08:00:00 EST <![CDATA[System and control method for detecting an abnormal burning situation using air pressure sensing and flame detection]]> http://www.freepatentsonline.com/8109758.html Tue, 07 Feb 2012 08:00:00 EST <![CDATA[Passive noise attenuation system]]> http://www.freepatentsonline.com/8109362.html Tue, 07 Feb 2012 08:00:00 EST