| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 7 | |
| #2 | Switzerland | 3 | |
| #3 | Denmark | 3 | |
| #4 | Belgium | 2 | |
| #5 | Canada | 2 | |
| #6 | Germany | 2 | |
| #7 | United Kingdom | 2 | |
| #8 | France | 1 | |
| #9 | Italy | 1 | |
| #10 | Kenya | 1 | |
| #11 | Malaysia | 1 | |
| #12 | Norway | 1 | |
| #13 | Sweden | 1 | |
| #14 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Foundations and excavations | |
| #2 | Construction of bridges | |
| #3 | Shafts |
| # | Name | Total Patents |
|---|---|---|
| #1 | Griffioen Albert | 10 |
| #2 | Veen Romke Van Der | 8 |
| #3 | Griffioen A | 5 |
| #4 | Hofmeijer J | 2 |
| #5 | Jorn Yding Tonnisen | 1 |
| #6 | Tonnisen J | 1 |
| #7 | Milligen P Van | 1 |
| #8 | Milligen P C V | 1 |
| #9 | Albert Griffioen | 1 |
| #10 | Milligen Paul Cornelis Van | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL7808282A | Method and apparatus for building a bridge | |
| GB1343198A | Method of laying a foundation for an underwater structural element | |
| US3665718A | Method of filling a space under a structural element and structure therefor | |
| CA912842A | Method of laying a foundation for a structural element under water |