| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 3 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | United States | 2 | |
| #4 | Canada | 1 | |
| #5 | Denmark | 1 | |
| #6 | Finland | 1 | |
| #7 | Japan | 1 | |
| #8 | Norway | 1 | |
| #9 | Portugal | 1 |
| # | Industry | |
|---|---|---|
| #1 | Packaging and shipping | |
| #2 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Cranes | |
| #2 | Ships | |
| #3 | Marine propulsion |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zwagerman Jan | 9 |
| Publication | Filing date | Title |
|---|---|---|
| NL8603202A | Construction assembly of separate building elements. | |
| NL8402745A | Amphibious vehicle for difficult working areas - has pontoons lifted and movable in lengthwise and transverse directions | |
| NL8302687A | Mobile crane. |