Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE31959 | Sealing means for a coke oven chuck door | Calvin E. Kelly | 1985-07-30 |
| 4216062 | Sealing means for a coke oven chuck door | Calvin E. Kelly | 1980-08-05 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE31959 | Sealing means for a coke oven chuck door | Calvin E. Kelly | 1985-07-30 |
| 4216062 | Sealing means for a coke oven chuck door | Calvin E. Kelly | 1980-08-05 |