Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4603078 | Construction panel made of polyurethane integral hard foam | Helmut Zanker | 1986-07-29 |
| 4341831 | Shapes for windows or doors | — | 1982-07-27 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4603078 | Construction panel made of polyurethane integral hard foam | Helmut Zanker | 1986-07-29 |
| 4341831 | Shapes for windows or doors | — | 1982-07-27 |