Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6233990 | Method for manufacturing a formed piece of metal | Ari Piispanen | 2001-05-22 |
| 6145362 | Process and apparatus for the manufacture of a cooking vessel by roll forming | Ari Piispanen, Timo Savinainen, Juha Varis, Veli Pekka Kujanpaa | 2000-11-14 |
| 6061892 | Method for joining metal parts by roll forming for manufacturing a cooking vessel | — | 2000-05-16 |