Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683975 | Floor wiping composition | Birgit Skodell, Karl-Heinz Rogmann | 1997-11-04 |
| 5680667 | Head for a floor-cleaning mop | Franz Kresse, Hans-Leo Fernschild, Gerhard Ostwald | 1997-10-28 |