Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5676750 | Process of treatment and environment-friendly utilization of asbestos-cement products | Joachim Kieser, Stefan Ambrosius, Helmut Gormar, Arno Krahner, Wolf-Joachim Buhrandt | 1997-10-14 |