| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 5 | |
| #2 | Germany | 3 | |
| #3 | France | 1 | |
| #4 | United Kingdom | 1 | |
| #5 | Japan | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Transport |
| # | Name | Total Patents |
|---|---|---|
| #1 | Goedvolk Arie | 2 |
| #2 | Boehle Hendrik Arie | 1 |
| #3 | Brakel Joost | 1 |
| #4 | Yoosuto Burakeru | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2828018A1 | Suction dredger vessel - has trough formed between hold bottom flaps and joint between vessel halves | |
| NL7714438A | Towing head for a dredger. | |
| NL7702851A | Stone catcher for a suction dredger. | |
| NL7414070A | Depositing ballast in deep water using vessel - by lowering suspended net below vessel and emptying when near bottom |