Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6550500 | Plastic pipe having a socket, and a method of providing a plastic pipe with a socket | Jyri Jarvenkyla | 2003-04-22 |
| 6446674 | Method of producing homogeneous material with an extruder, an extruder, and a multilayer plastic pipe | Kari Kirjavainen, Jyri Jarvenkyla | 2002-09-10 |
| 6073657 | Method for producing homogeneous material with an extruder, an extruder, and a multilayer plastic pipe | Kari Kirjavainen, Jyri Jarvenkyla | 2000-06-13 |