Mehrschichtiger, kartenförmiger Datenträger und Verfahren zur Herstellung desselben
摘要
In a multi-layer card-shaped data storage medium having a layer which appears black in the visible wavelength range but is transparent to test rays in the invisible wavelength range, markings masked by the layer appearing black are provided which are generated by means of a laser beam writer in or underneath the black layer. …<IMAGE>…
申请公布号
DE4033300(C2)
申请公布日期
1994.06.23
申请号
DE19904033300
申请日期
1990.10.19
申请人
GAO GESELLSCHAFT FUER AUTOMATION UND ORGANISATION MBH, 81369 MUENCHEN