A powered wireless link device powers a bar code scanner or other optical symbol reader and connects it with a remote computer terminal. The link device has a housing that contains a battery, a data-powered RF (or IR) interface unit, a serial data connector on the housing for connecting to a connector...http://www.google.fr/patents/US6581837?utm_source=gb-gplus-shareBrevet US6581837 - Wireless interface for bar code scanner
