Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Walter R. Altfather | — | 1 |
| 1 | Edward L. Dufford | Ppg Industries | 1 |
| 1 | Joseph W. Tommaney | Allegheny Ludlum Steel | 1 |
| 1 | Dennis A. Simpson | Ppg Industries Ohio | 1 |
Part of Pennsylvania
4 patents · 4 inventors
Ranked #6,634 of 20,767 cities Top 35%
Showing 1–4 of 4 inventors
| Rank | Inventor | Primary Company | Patents |
|---|---|---|---|
| 1 | Walter R. Altfather | — | 1 |
| 1 | Edward L. Dufford | Ppg Industries | 1 |
| 1 | Joseph W. Tommaney | Allegheny Ludlum Steel | 1 |
| 1 | Dennis A. Simpson | Ppg Industries Ohio | 1 |
Part of Pennsylvania