Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863177 | Split labyrinth seal | Richard P. Antkowiak, John S. Pehl | 1989-09-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863177 | Split labyrinth seal | Richard P. Antkowiak, John S. Pehl | 1989-09-05 |