Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4286792 | Self-replenishing seal for the gas offtake piping of a coke oven and sealing method | Robert E. Hagedorn, Joseph G. Uhlman | 1981-09-01 |
| 4252299 | Method and apparatus for discharging material from a shaft furnace | — | 1981-02-24 |