Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823971 | Housing assembly for a smoke exhaust electrical fan | — | 1989-04-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823971 | Housing assembly for a smoke exhaust electrical fan | — | 1989-04-25 |