Patent References 3812490 3863249 Electro-visual indicators Wall-hanging type magnetic displaying device Construction of an epid bar graph Magnetic display panel Magnetophoresis type display and graphic input/output device using the same Display apparatus Portable information record medium having liquid crystal and photoconductive layers Credit card pager apparatus Patent #: 5192947 InventorApplicationNo. 864217 filed on 04/06/1992US Classes:235/493, Magnetic40/449, Magnetic235/380Credit or identification card systemsExaminersPrimary: Cross, E. RollinsAssistant: Solis, Erick Attorney, Agent or FirmForeign Patent References
International ClassG06K 019/06AbstractA new type of payment card includes a magnetically controlled display for visually reading magnetically recorded information such as current balance or available service value of the payment card. The required electronic and mechanical interface can be added to existing payment card handling equipment.Other References
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