Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6210617 | Apparatus and method for adjusting a mandrel and kernel while producing a plastic pipe | Jyri Jarvenkyla | 2001-04-03 |
| 6050800 | Sizing apparatus | Peter Glanville Chapman, Allan K. Wallace, Leslie Herbert Cowling, Jyri Jarvenkyla | 2000-04-18 |
| 6016849 | Plastics pipe | David Charles Harget, Mikael Andersson, Jyri Jarvenkyla | 2000-01-25 |
| 5340299 | Apparatus for manufacturing ribbed pipes | Jyri Jarvenkyla | 1994-08-23 |
| 5148837 | Pipe for relining underground pipelines | Lennart Agren | 1992-09-22 |
| 5139730 | Method and apparatus for manufacturing ribbed pipe | Paul Holso, Jyri Jarvenkyla, Dieter Scharwachter, Lennart Agren | 1992-08-18 |
| 4929409 | Method in manufacturing a heat insulated tube and a device in extruders for manufacturing the tube | Lennart Agren | 1990-05-29 |