Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5676224 | Electrical collector shoe assembly | William R. Heil, Robert Scott Beale | 1997-10-14 |
| 5605209 | Composite electrical conductor rail | William R. Heil, Robert Scott Beale | 1997-02-25 |
| 5373926 | Insulated rail electrification system | William R. Heil, Robert Scott Beale | 1994-12-20 |
| 4269051 | Rolling mills and operation thereof | Douglas J. Thomas, George T. F. Kilmister, Robert R. Beal | 1981-05-26 |