An apparatus for reading commodity data is disclosed which comprises a support member, a reader formed of a reader body and a reading window provided on one face of the reader body, in which the reader is attached to the support member for rotation. The attitude of the reaading window can thus be adjusted...http://www.google.ca/patents/US4963721?utm_source=gb-gplus-sharePatent US4963721 - Rotatable bar code reader arrangement for a check out system
