An apparatus and method for providing an indication of a type of note passing through the apparatus includes a note transport (12) which moves the note past transversely spaced spot sensing assemblies (18). Each spot sensing assembly includes four emitters (32). Each of the emitters produces radiation...http://www.google.se/patents/US5923413?utm_source=gb-gplus-sharePatent US5923413 - Universal bank note denominator and validator
