| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 3 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | EPO (European Patent Office) | 2 | |
| #4 | Netherlands | 2 | |
| #5 | United States | 1 | |
| #6 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Dredging | |
| #2 | Analysing materials |
| # | Name | Total Patents |
|---|---|---|
| #1 | Van Berk Hendrikus | 6 |
| #2 | Berk Hendrikus Van | 6 |
| #3 | Brouwer Jan | 5 |
| #4 | Zeldenrust Sjerp | 4 |
| Publication | Filing date | Title |
|---|---|---|
| NL1009248C2 | Device for measuring the density of a flowing medium. | |
| NL1007551C2 | Method for extracting and sorting sand. | |
| AU2421095A | Dredging installation |