Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865637 | Filter cartridge | — | 1989-09-12 |
| 4850853 | Air control system for a burner | Dale G. Putnat, Ernest J. Zajaczkowski | 1989-07-25 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4865637 | Filter cartridge | — | 1989-09-12 |
| 4850853 | Air control system for a burner | Dale G. Putnat, Ernest J. Zajaczkowski | 1989-07-25 |