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The patent has been awarded for the Heat Retentive Plates (Us 7,176,426), actually is a patent for a microwaveable heat storage device that can be embodied as a plate among other things. Acoffee mug can also be manufactured that maintains the coffee hot to the last sip without overheating it. Preheat in a microwave for one minute, stays hot for typically 30 minutes and the rim does not get hot for easy handling.
InstaHot(TM), zap and serve(TM) by Hot Smart(TM).