The present invention relates to an apparatus for remote tyre pressure monitoring that is secured onto a wheel surface. The apparatus as a unit comprises or includes a circuit including at least a sensor element to sense air pressure, signal processing circuitry, and data transmitting circuitry and an...http://www.google.fr/patents/US20050262934?utm_source=gb-gplus-shareBrevet US20050262934 - Tyre pressure monitoring sensor
