Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858254 | Tub apparatus | John M. Popovich | 1989-08-22 |
| 4843659 | Tub apparatus | John M. Popovich | 1989-07-04 |
| 4836862 | Thermophotovoltaic system | David G. Pelka, John M. Popovich | 1989-06-06 |
| 4795319 | Quiet hair dryer | John M. Popovich | 1989-01-03 |