Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839299 | Assay for the free portion of substances in biological fluids | John E. Midgley, Terence A. Wilkins | 1989-06-13 |
| 4797970 | Foot-operated door security device | — | 1989-01-17 |