Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D304854 | Portable air filter | Ian M. Williamson | 1989-11-28 |
| D304612 | Laser smoke particulate/odor filter unit for use in surgical environments | Ian M. Williamson | 1989-11-14 |
| D303166 | Clean room safety hood | Ian M. Williamson | 1989-08-29 |
| 4826513 | Laser smoke particulate/odor filter system | Ian M. Williamson | 1989-05-02 |
| 4810269 | Point one micron filtering system | Ian M. Williamson | 1989-03-07 |