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| Number | Title | Issue Date |
| 5832556 | Encoded card for cleaning currency readers A cleaning card for cleaning the sensors and rollers and other parts of currency readers is disclosed. The cleaning card of the present invention comprises a single layer, non-laminated or a multi-layer, laminated cleaning material having the same or simi... | 11/10/1998 |
| 5824611 | Dual purpose cleaning card A cleaning card has a flat, semirigid base with a first and second material mechanically bonded to the side surfaces thereof. The first material is an abrasive substantially impenetrable material and the second material is a soft spunlaced fabric of high ... | 10/20/1998 |
