Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858520 | Auxiliary frame for ceiling mounted air diffusers and the like | Kenneth E. Prochnow | 1989-08-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858520 | Auxiliary frame for ceiling mounted air diffusers and the like | Kenneth E. Prochnow | 1989-08-22 |