Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819420 | Process and device for piecing to an open-end friction spinning device | Werner Billner | 1989-04-11 |
| 4817380 | Process and device for piecing up an open-end friction spinning device | — | 1989-04-04 |