Registers – Records
Patent
1987-07-13
1989-03-07
Pellinen, A. D.
Registers
Records
235454, 346 76L, 350 361, 365106, G06K 1900
Patent
active
048108685
ABSTRACT:
A data card having an optical recording medium formed by an erasable layer atop a polymer layer with prerecorded indicia, all atop a card base. The polymer layer has surface contours which constitute prerecorded indicia. The erasable layer disposed over the polymer layer displays the prerecorded indicia for reading, together with information on the erasable strip. The erasable material may be magnetooptical material, amorphous-crystalline material or liquid crystal material.
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Drexler Technology Corporation
Fuller Leon K.
Pellinen A. D.
Schneck Thomas
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