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| Number | Title | Issue Date |
| 5275819 | Drug loaded pollen grains with an outer coating for pulsed delivery A pulsating release composition comprising natural microspheres, such as pollen grains or spores, into which are loaded a biologically active is subsequently releasable therefrom in a predetermined location in or on a plant or animal in a series (generall... | 01/04/1994 |
