Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4778106 | Stud, arc shield and rail clip for securing railroad rails | William F. Langman, George P. Dunn, Albert E. Rex | 1988-10-18 |
| 4424935 | Spring rail fastener | William F. Langman, Jack Clark | 1984-01-10 |