Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5221880 | Underground trolley vehicle with brushless D.C. Motor | Michael L. Bartholow | 1993-06-22 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5221880 | Underground trolley vehicle with brushless D.C. Motor | Michael L. Bartholow | 1993-06-22 |