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| Number | Title | Issue Date |
| 4943435 | Prolonged activity nicotine patch A transdermal patch for delivering nicotine for prolonged periods of 12-24 hours. The patch includes a rate-controlling membrane or monolith to keep the nicotine flux within useful and safe limits. The patch is typically replaced once a day, and can be us... | 07/24/1990 |
| 4919939 | Periodontal disease treatment system A controlled release drug delivery system for placement in the periodontal pocket, gingival sulcus, tooth socket, wound or other cavity within the mouth. The system incorporates drug-containing microparticles in a fluid carrier medium, and is effective in... | 04/24/1990 |
| 4898582 | Portable infusion device assembly A portable infusion device assembly, having two side-by-side compartments, the first containing the drug or agent to be infused and an osmotic pump, and the second containing the driving liquid for the pump. The two chambers are separated during storage b... | 02/06/1990 |
