Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6142087 | Cutting device for creating a slit opening for a buttonhole | Christian Mollenkamp | 2000-11-07 |
| 5931106 | Buttonhole sewing machine, with a needle-thread clamp and cutter | Gerd Papajewski, Christian Mollenkamp | 1999-08-03 |