An electrode unit for detecting whether a seat is occupied or not (occupancy conditions) is embedded in a seat of an automotive vehicle together with an electrically powered seat heater. Both of the electrode unit and the seat heater are flat, and the electrode unit is laminated on the heat heater. The...http://www.google.com.hk/patents/US7928341?utm_source=gb-gplus-share專利 US7928341 - Passenger seat having occupant detector for automotive vehicle
