Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6446674 | Method of producing homogeneous material with an extruder, an extruder, and a multilayer plastic pipe | Esko Hippeläinen, Kari Kirjavainen | 2002-09-10 |
| 6416211 | Method and apparatus for molding plastic | Kari Kirjavainen | 2002-07-09 |
| 6375226 | Pipe connector having mechanical and fusion connections | Alan J. Dickinson | 2002-04-23 |
| 6372168 | Method of manufacturing branched pipe | — | 2002-04-16 |