| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | Austria | 3 | |
| #3 | Switzerland | 3 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Roof coverings | |
| #2 | General building constructions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Manfred Helfrecht | 2 |
| #2 | Mueller Siegfried | 1 |
| #3 | Helfrecht Manfred | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2259608A1 | WEATHER-PROOF ROOF AND FACADE COVERING FOR PANEL COVERING | |
| DE2258328A1 | ROOF COVERING | |
| DE2233058A1 | COVERING ELEMENT | |
| DE2227359A1 | ROOF COVERING AND INSULATION | |
| DE2162193A1 | THERMAL INSULATION INTERIOR PANELING FOR TILE ROOFS | |
| DE2145628A1 | THERMAL DAMAGE PAD FOR WARM TILE ROOFS | |
| DE2065326A1 | ROOF COVERING | |
| CH516060A | Roof covering - with plastics sheet and expanded polystyrene beneath tiles |