Top Inventors at Duro-Last Roofing All Time
Showing 1–4 of 4 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | John C. Greko | 4 |
| 2 | Francis R. Laurion | 2 |
| 2 | Wayne G. Nichols | 2 |
| 2 | Albert S. Janni | 2 |
Showing 1–4 of 4 inventors
| Rank | Name | Patents |
|---|---|---|
| 1 | John C. Greko | 4 |
| 2 | Francis R. Laurion | 2 |
| 2 | Wayne G. Nichols | 2 |
| 2 | Albert S. Janni | 2 |