Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828433 | Roof supports | Helmut Poklekowski, Klaus Reichelt | 1989-05-09 |
| 4815898 | Roof supports | Klaus Seeberger, Harry Rosenberg, Wolfgang Stradtmann | 1989-03-28 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828433 | Roof supports | Helmut Poklekowski, Klaus Reichelt | 1989-05-09 |
| 4815898 | Roof supports | Klaus Seeberger, Harry Rosenberg, Wolfgang Stradtmann | 1989-03-28 |