Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4910935 | Two-layer cavity floor covering | Andreas Bettgens, Horst W. Mueller, Horst Tamm | 1990-03-27 |
| 4770916 | Electrically conductive flooring | Horst Muller, Horst Tamm | 1988-09-13 |