Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5666685 | Hand-held implement for cleaning smooth surfaces | Tassilo von Grolman, Uwe Dingert | 1997-09-16 |
| D366739 | Combined cleaning and wiping device | Tassilo von Grolman, Uwe Dingert | 1996-01-30 |