Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700172 | Submerged marine exhaust system | Douglas A. Keehn, Jr. | 1997-12-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5700172 | Submerged marine exhaust system | Douglas A. Keehn, Jr. | 1997-12-23 |