A pizza warmer and oven system in which a plurality of pizza warmers containing a phase change material can be charged to their preferred temperatures by resistance heaters positioned in shelves above and below each warmer in an oven. One embodiment has top shelves biased in close proximity with the...http://www.google.com/patents/US6414278?utm_source=gb-gplus-sharePatent US6414278 - Pizza warmer and oven system