| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 3 | |
| #2 | EPO (European Patent Office) | 3 | |
| #3 | Australia | 1 | |
| #4 | Brazil | 1 | |
| #5 | China | 1 | |
| #6 | Netherlands | 1 | |
| #7 | Norway | 1 | |
| #8 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Scaffolding | |
| #2 | Shafts | |
| #3 | Platform constructions |
| # | Name | Total Patents |
|---|---|---|
| #1 | Vos Charles Jacques | 7 |
| #2 | Wernsen Paul | 7 |
| #3 | Van Eeden Johannes Petrus | 4 |
| Publication | Filing date | Title |
|---|---|---|
| NL9301988A | Method for manufacturing a tunnel-shaped hood or screen over a traffic route, such as a motorway or railway. | |
| CA2094399A1 | Method of manufacturing a dome-or tunnel-shaped structure | |
| EP0549595A1 | Method of manufacturing a hollow self-supporting concrete structure |