Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5666633 | Method of producing interlocking metal parts | Bernd Hein, Guenter Seibold, Manfred Haage, Bernd Plocher | 1997-09-09 |
| 5637158 | Method for the manufacture of an expansible anchor consisting of corrosion-resistant steel | Bernd Hein, Paul Gumpel | 1997-06-10 |