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| Number | Title | Issue Date |
| 6605300 | Oral pulsed dose drug delivery system A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising an immediate-release component and an enteric delayed-release component wherein (1) the enteric release coating has a defined minimum thickness and/or (2... | 08/12/2003 |
| 6322819 | Oral pulsed dose drug delivery system A multiple pulsed dose drug delivery system for pharmaceutically active amphetamine salts, comprising an immediate-release component and an enteric delayed-release component wherein (1) the enteric release coating has a defined minimum thickness and/or (2... | 11/27/2001 |