Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6643997 | Method and device for adapting the volume of collar bag and collar bag thus used | Dieter Schwenke, Jurgen Tegtmeyer | 2003-11-11 |
| 6533457 | Sack | Dieter Schwenke | 2003-03-18 |