Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5175932 | Portable handheld tool having a drive shaft rotatably journalled in a protective tube | Karl-Heinz Lange, Helmut Schlessmann | 1993-01-05 |
| D276662 | Portable pneumatic sweeper | Gerhard Zerrer, Karl-Erich Koch | 1984-12-04 |
| 4461055 | Portable sweeping device | Gerhard Zerrer | 1984-07-24 |