Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4484563 | Air ventilation and pollution cleaning system | Frederick F. Fritz | 1984-11-27 |
| 4483316 | Air ventilation system | Frederick F. Fritz | 1984-11-20 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4484563 | Air ventilation and pollution cleaning system | Frederick F. Fritz | 1984-11-27 |
| 4483316 | Air ventilation system | Frederick F. Fritz | 1984-11-20 |