A portable end device, such as a bar code scanner, may be equipped with auxiliary interfaces. The auxiliary interfaces may be easily added to the end device as a replaceable cover, such as a replaceable battery door. A signal path conducts signals to and from the replaceable cover. One auxiliary interface...http://www.google.fr/patents/US7377441?utm_source=gb-gplus-shareBrevet US7377441 - Electronic device with auxiliary interfaces
