Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4797161 | Mixture for manufacture of shaped elements and its use | Karl Kirchmayr, Bruno Watzka, Josef Studinka, Carl Schmitt-Henco | 1989-01-10 |
| 4662141 | Roofing element | — | 1987-05-05 |