Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4793788 | Apparatus of extruding a plastic pipe under control of the wall thickness of the extruded plastic pipe | Koos Borger | 1988-12-27 |
| 4749531 | Method and apparatus of extruding a plastic pipe under control of the wall thickness of the extruded plastic pipe | Koos Borger | 1988-06-07 |
| 4634844 | Electroweldable socket and a device of manufacturing such a socket | Bernhard Lodder, Jan P. van Dongeren | 1987-01-06 |