A travel registration arrangement including a travel pass unit for general communication, e.g. by train, by air, by sea, by bus. The unit (15) includes a processor, a write and erasable memory unit connected to the processor, a display window (2) and keys that can be manipulated by a traveller...http://www.google.fr/patents/US5801367?utm_source=gb-gplus-shareBrevet US5801367 - Voyage registration system
