A massage system incorporates a battery operated power supply which is mounted in a compartment formed in the tongue of a shoe. The power supply is connected to vibrators which are mounted in circular beds formed in the sole of the shoe. The power supply and the vibrators are connected by wires...http://www.google.de/patents/US5836899?utm_source=gb-gplus-sharePatent US5836899 - Vibrating massage system for footwear
