Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4637175 | Construction for fastening parts to a concrete wall | Helmut Froening | 1987-01-20 |
| 4483121 | Anchor construction for concrete walls or slabs | Helmut Froening | 1984-11-20 |