Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5663122 | Mineral additives for setting and/or controlling the rheological properties and gel structure of aqueous liquid phases and the use of such additives | Wolfgang Breuer, Claus-Peter Herold, Peter Kuhm, Stephan von Tapavicza | 1997-09-02 |
| 5649986 | Filter for filtering the intake air of an internal combustion engine | — | 1997-07-22 |