http://www.freshpatents.com/Electric-resistance-heating-devices-dtnewntc392.php USPTO Class 392 - Electric resistance heating devices en-us Mon, 23 Jan 2012 13:32:04 -0800 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/-dt20120119ptan20120014678.php Mon, 23 Jan 2012 13:32:04 -0800 A heater assembly to be located at a substantially vertical wall for heating air. The heater assembly includes one or more heating elements, and one or more heat transfer elements mounted on the heating element for transferring heat to a column of the air moving substantially upwardly past the heat... http://www.freshpatents.com/-dt20120119ptan20120014679.php Mon, 23 Jan 2012 13:32:04 -0800 Provided is a fluid heating device capable of suppressing reduction of heating efficiency even if a fluid mainly containing sulfuric acid is heated. The fluid heating device of the present invention is a fluid heating device for heating chemicals mainly containing sulfuric acid, and includes a translucent inner tube 3a... http://www.freshpatents.com/-dt20120119ptan20120014680.php Mon, 23 Jan 2012 13:32:04 -0800 The present invention relates to a PTC based heating device for a motor vehicle, preferably with electrical propulsion, in which one or a plurality of supplementary circuits are connected to a heating circuit for being switched in optionally. In this way it is possible to use a large number of...