Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5666633 | Method of producing interlocking metal parts | Norbert Arnold, Bernd Hein, Manfred Haage, Bernd Plocher | 1997-09-09 |
| 5634752 | Anchor bolt for anchoring by compound mass, and method of manufacturing the same | Manfred Haage, Bernd Plocher, Bernd Hein, Wilfried Weber | 1997-06-03 |