| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 8 | |
| #2 | Switzerland | 7 | |
| #3 | United States | 6 | |
| #4 | Canada | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | General building constructions | |
| #2 | Construction of bridges | |
| #3 | Structural elements | |
| #4 | Foundations and excavations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Peter Emil | 19 |
| #2 | Emil Peter | 2 |
| Publication | Filing date | Title |
|---|---|---|
| CH687773A5 | Composite structure, in particular bridge. | |
| DE4215039A1 | Composite of wood and reinforced concrete | |
| US4924638A | Domed support structure | |
| US4471585A | Domed support framework | |
| CH637719A5 | Vaulted structure. | |
| DE2752222A1 | PRE-TENSIONED STRUCTURE | |
| US4074502A | Method for manufacturing a support framework | |
| DE2419465A1 | Roof structure counter-arched support elements - as support panels in bearing area with interlocking reinforcing ribs |