Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875340 | Non-contaminating flow visualization system | James W. Ramsey | 1989-10-24 |
| 4827779 | Cartridge personal sampling impactor | Virgil A. Marple | 1989-05-09 |
| 4817652 | System for surface and fluid cleaning | Kang-Ho Ahn | 1989-04-04 |