Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886668 | Multiparticulate controlled porosity osmotic pump | John L. Haslam | 1989-12-12 |
| 4880631 | Controlled porosity osmotic pump | John L. Haslam | 1989-11-14 |
| 4851228 | Multiparticulate controlled porosity osmotic | Gaylen M. Zentner, Kenneth J. Himmelstein | 1989-07-25 |