Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5253642 | Surgical gown | Mildred K. Stackhouse, Richard J. Greff, Frederic Bongard, Stanley R. Klein | 1993-10-19 |
| 5046492 | Clean room helmet system | Ian M. Williamson | 1991-09-10 |
| 4986282 | Face shield system | Ian M. Williamson | 1991-01-22 |
| D306363 | Face shield | Ian M. Williamson | 1990-02-27 |
| 4901716 | Clean room helmet system | Ian M. Williamson | 1990-02-20 |
| 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 |
| D298473 | Filtration unit for exhaust air from a clean room helmet worn for a sterile environment or the like | Ian M. Williamson | 1988-11-08 |