Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6755747 | Method of manufacturing an expansion sleeve | Claudia Zimmerer, Heinz Bisping, Alois Koelbl, Erich Daigeler | 2004-06-29 |
| 6712572 | Expansion dowel | Heinz Bisping, Alois Kolbl, Claudia Zimmerer | 2004-03-30 |