Top Inventors at Enterra All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Edward C. Norman | 3 |
| 2 | Howard A. Dowell | 2 |
| 3 | Peter J. Chiesa, Jr. | 2 |
| #4 | Fay A. Purvis | 1 |
| #5 | Robert W. Bennett | 1 |
| #6 | Roger A. Ruth | 1 |
| #7 | Shannon Rogers | 1 |
| #8 | William Schock | 1 |
| Rank | Name | Patents |
|---|---|---|
| 1 | Edward C. Norman | 3 |
| 2 | Howard A. Dowell | 2 |
| 3 | Peter J. Chiesa, Jr. | 2 |
| #4 | Fay A. Purvis | 1 |
| #5 | Robert W. Bennett | 1 |
| #6 | Roger A. Ruth | 1 |
| #7 | Shannon Rogers | 1 |
| #8 | William Schock | 1 |