Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5347933 | Railway ballast cleaning machine with integrated hopper car | James H. Perkins | 1994-09-20 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5347933 | Railway ballast cleaning machine with integrated hopper car | James H. Perkins | 1994-09-20 |