Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5034104 | Servicing and emptying apparatus for coke-oven battery | Karl Gregor | 1991-07-23 |
| 4366004 | Method of internally cleaning coke chamber risers | Karl Gregor | 1982-12-28 |
| 4189272 | Method of and apparatus for charging coal into a coke oven chamber | Karl Gregor | 1980-02-19 |