Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4786339 | Jacketing steel objects | Walter C. Meyer | 1988-11-22 |
| 4519863 | Method and device for jacketing a steel pipe with several plastic materials | Helmut Landgraf | 1985-05-28 |
| 4510007 | Method of jacketing steel pipes | — | 1985-04-09 |
| 4484877 | Twin-nozzle extrusion head | Karl-Heinz Glissmann | 1984-11-27 |
| 4451413 | Jacketing steel tubes and pipes | Karl-Heinz Glissmann | 1984-05-29 |
| 4386996 | Apparatus for the jacketing of steel pipes | Helmut Landgraf | 1983-06-07 |