The microwave heating apparatus consists of a microwave cavity, a energizing source, a mechanism for holding and agitating a load, and a temperature detector for continuously monitoring the temperature of the load. It is particularly useful for heating and quickly thawing frozen blood plasma or intravenous...http://www.google.ca/patents/US4336435?utm_source=gb-gplus-sharePatent US4336435 - Microwave apparatus for heating liquid in a closed plastic container
