Issued Patents All Time
Showing 1–3 of 3 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 |
| 6457298 | Method device for transporting, controlling, filling and sealing a sack | Dieter Schwenke | 2002-10-01 |