| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 5 | |
| #2 | Australia | 4 | |
| #3 | WIPO (World Intellectual Property Organization) | 4 | |
| #4 | EPO (European Patent Office) | 3 | |
| #5 | Canada | 2 | |
| #6 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Environmental technology | |
| #3 | Machines | |
| #4 | Thermal processes | |
| #5 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Water treatment | |
| #3 | Spraying devices | |
| #4 | Domestic heating systems | |
| #5 | Domestic plumbing installations |
| # | Name | Total Patents |
|---|---|---|
| #1 | Scharstuhl Johan Jan | 20 |
| #2 | Scharstuhl Eric | 18 |
| Publication | Filing date | Title |
|---|---|---|
| NL1020607C2 | Fluid throughflow device, such as hand douche, has connections for fluid input and fluid output, together with at least one membrane filter with pore diameter of less than 0.5 micrometers in between connections so that fluid flows through | |
| NL1017681C2 | Filter system. | |
| NL1016486C2 | Filter device with a cylindrical pre-filter around a filtration membrane module. | |
| NL1015384C2 | Water filtration device. | |
| NL1012715C2 | Filter device with a cylindrical pre-filter around a filtration membrane module. | |
| EP0938367A1 | Water filtration device |