| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Structural elements | |
| #2 | Roof coverings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Haack Egon An | 3 |
| #2 | An Haack E | 1 |
| #3 | Haack E | 1 |
| #4 | Egon An Haatsuku | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1595213A | Methods of and apparatus for producing structural panel elements | |
| DE2748361A1 | Corrugated plate construction component - has sheet metal reinforcing elements on one or both sides held in place by rivets |