The imaging result obtained by an imaging device for imaging light reflected by a bar code symbol and incident on it via a first mirror is decoded by a decoder and stored in a first symbol label memory. The bar code symbol label is again imaged by the imaging device via a second mirror, and the imaging...http://www.google.es/patents/US5347114?utm_source=gb-gplus-sharePatente US5347114 - Bar code symbol reading apparatus
