Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5359815 | Profile grinder | Robert R. Schrunk, III, Harry Madison | 1994-11-01 | $3,727,000 |
| 5305692 | Truck mounted tie exchanger with self-aligning tie clamp | Harry Madison, Robert F. Ryan | 1994-04-26 | $4,809,000 |
| 5191841 | Railroad bogie and rail grinder using the bogie | — | 1993-03-09 | $6,404,000 |