Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857080 | Ultrathin composite metal membranes | Jenny Louie, Peter Pfromm, Johannes G. Wijmans | 1989-08-15 |
| 4838862 | Portable controlled release osmotic infusion device | Verne Helm, Paul Shrock | 1989-06-13 |
| 4839174 | Novel transdermal nicotine patch | Frank Kochinke, Carl Huang | 1989-06-13 |
| 4808408 | Microcapsules prepared by coacervation | Yasuo Ninomiya | 1989-02-28 |