Top Inventors at Gray Tool All Time
| Rank | Name | Patents |
|---|---|---|
| 1 | Michael A. Karr, Jr. | 7 |
| 2 | Charles D. Bridges | 5 |
| 3 | Frank C. Adamek | 4 |
| #4 | Charles C. Hays | 2 |
| #5 | Robert E. Bush | 2 |
| #6 | Bert L. Morrison | 1 |
| #7 | Charles E. Jennings | 1 |
| #8 | Hollis G. Robison | 1 |
| #9 | James Vaull Bonds | 1 |
| #10 | James Dickson | 1 |
| #11 | John M. Zwiegel | 1 |
| #12 | Vernon G. Stewart | 1 |
| #13 | Warren D. King | 1 |
| #14 | John P. Mitcham | 1 |