Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D302470 | Sputum collector | Johnson N. S. Wong | 1989-07-25 |
| 4782977 | Tamper resistant container | Johnson N. S. Wong | 1988-11-08 |
| 4741346 | Speciman collector | Johnson N. S. Wong | 1988-05-03 |