Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886438 | Method and apparatus of extruding a plastic pipe under control of the wall thickness of the extruded plastic pipe | Koos Borger | 1989-12-12 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886438 | Method and apparatus of extruding a plastic pipe under control of the wall thickness of the extruded plastic pipe | Koos Borger | 1989-12-12 |