Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5605099 | Maintenance vehicle and method for measuring and maintaining the level of a railroad track | Dennis A. Sroka, William E. Perry, David Mathew Johnson | 1997-02-25 |
| 4625412 | Apparatus and method for measuring the wear of railroad rail | — | 1986-12-02 |
| 4468966 | Railroad track inspection car | — | 1984-09-04 |
| 4452146 | Railroad track tamper level control system | Robert N. Clive | 1984-06-05 |