Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4883453 | Method of manufacturing synthetic vascular grafts | David Annis | 1989-11-28 |
| 4842505 | Apparatus for producing fibrous structures electrostatically | David Annis | 1989-06-27 |