Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4291500 | Apparatus for opening and closing air lock doors | Richard A. Lofy, Robert S. Dean | 1981-09-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4291500 | Apparatus for opening and closing air lock doors | Richard A. Lofy, Robert S. Dean | 1981-09-29 |