Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691888 | Power controlling unit for a trolley pole switch controller | John H. Corvin, Charles C. Siegling, III | 1997-11-25 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5691888 | Power controlling unit for a trolley pole switch controller | John H. Corvin, Charles C. Siegling, III | 1997-11-25 |