Jeff writes in –
This CookTek “Incogneeto” cook top was displayed at NAFM in late 2007. It’s capable of heating to 190 deg F through any sort of counter top (granite, composite etc) without causing damage to the counter itself. Because of RFID technology, These units also do not require special markings to determine where the cook top is under the counter. There isn’t much information available on the internet at the moment, the product has only been available to purchase for about a week.