| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 4 | |
| #2 | Netherlands | 4 | |
| #3 | United States | 4 | |
| #4 | WIPO (World Intellectual Property Organization) | 4 | |
| #5 | Brazil | 2 | |
| #6 | China | 2 | |
| #7 | Republic of Korea | 2 | |
| #8 | Singapore | 2 | |
| #9 | Australia | 1 | |
| #10 | Hong Kong | 1 | |
| #11 | Mexico | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Transport | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Earth drilling | |
| #2 | Foundations and excavations | |
| #3 | Mining | |
| #4 | Ships | |
| #5 | Gearing |
| # | Name | Total Patents |
|---|---|---|
| #1 | Zuidberg Herman Maria | 14 |
| #2 | Looijen Peter Nicolaas | 11 |
| #3 | Looijen Peter | 8 |
| #4 | Schrier Willem Henricus | 5 |
| #5 | Kolenbrander Jacobus Gerardus | 3 |
| #6 | Zuidberg Herman M | 1 |
| #7 | Peter Looijen | 1 |
| #8 | Looijen Peter N | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL1027337C2 | Movable support structure. | |
| AU1106602A | Downhole coring device | |
| NL1009662C2 | Device for taking a soil sample, as well as a sampling device to be used therein. | |
| HK31497A | Apparatus for longitudinally driving an elongate body | |
| NL9500049A | Soil testing and sampling system. |