Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807522 | Piston and attaching apparatus for piston-and-cylinder arrangements | Vesa Helske, Erkki Haapanen | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807522 | Piston and attaching apparatus for piston-and-cylinder arrangements | Vesa Helske, Erkki Haapanen | 1989-02-28 |