| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 9 | |
| #2 | EPO (European Patent Office) | 4 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Domestic heating systems | |
| #2 | Fluid heaters | |
| #3 | Transferring liquids | |
| #4 | Controlling combustion | |
| #5 | Containers for goods storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Willemsen Johannes Albertus He | 10 |
| #2 | Willemsen Johanus Albertus H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0870993A1 | Storage water heater | |
| NL1006559C2 | Regulation of fuel supply to a heating appliance. | |
| NL1005786C2 | Storage boiler comprising hot water reservoir | |
| NL1004086C1 | Boiler. | |
| NL1004084C2 | Liquid food container. | |
| NL1000503C2 | Storage boiler. | |
| NL9300130A | Method for producing a metal collar, which is provided with handles, for a vessel | |
| NL9200745A | Dhw water heater. |