| # | Country | Total Patents | |
|---|---|---|---|
| #1 | China | 4 | |
| #2 | WIPO (World Intellectual Property Organization) | 4 | |
| #3 | Netherlands | 3 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | Australia | 1 | |
| #6 | Russian Federation | 1 | |
| #7 | United States | 1 | |
| #8 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Packaging and shipping | |
| #4 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Dredging | |
| #2 | Pipes | |
| #3 | Cranes | |
| #4 | Working stone |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wijma Klaas Geert | 9 |
| #2 | Menheere Marco Daniel | 5 |
| #3 | Klaas Wijma | 1 |
| #4 | Geert Wijma Klaas | 1 |
| #5 | Stefan Ederyd | 1 |
| #6 | Vijma Klas Gert | 1 |
| #7 | Per Quarfordt | 1 |
| #8 | Claessens Stijn | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL2004985C2 | Pipe joint with ball joint. | |
| CN101889118A | Self- sharpening, auto- signalling wearing part | |
| NL2001584C2 | Lifting means. | |
| NL1031253C2 | Cutting head with improved yield, as well as cutter suction dredger provided with such a cutting head. |