Disclosed is a time-accounting system with optimized management. It can be applied, in particular, to accounting for paid or regulated parking times. The aim is to provide a system that enables a protected replacement of card, a management of fractions of parking units and a management of the change...http://www.google.com/patents/US5241162?utm_source=gb-gplus-sharePatent US5241162 - Accounting system for consumable units, with optimized management, notably to account for parking time units
