US Patent 9420800 Oven appliance

An oven appliance includes a baking stone positioned within a housing at a bottom portion of a cooking chamber. A controller is in operative communication with an upper heating element array, a lower heating element array, a pair of upper temperature sensors and a pair lower temperature sensors. The controller is configured for independently operating each of a first zone of the upper heating element array, a second zone of the upper heating element array, a first zone of the lower heating element array and a second zone of the lower heating element array.