Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5375546 | Shortening of needle thread end at the beginning and end of sewing in lockstitch sewing machines | Edgar Butzen, Karl-Heinz Walther, Fritz Jehle | 1994-12-27 |
| 5018465 | Sewing machine with thread monitor | Walter Hager, Edgar Butzen, Kurt Arnold | 1991-05-28 |