US Patent 7525433 Wireless communication module to be installed on vehicular license plate

A wireless communication module, which is to be installed on a license plate of a vehicle, has a memory device, a wireless communication circuit, a battery and a housing. The memory device stores vehicle information such as a registration number of the vehicle. The wireless communication circuit performs wireless communication with an outer apparatus to exchange the vehicle information. The battery supplies electric power to the memory device and to the wireless communication circuit. The housing receives the memory device, the wireless communication circuit and the battery therein and is to be fixed to the license plate.