| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 5 | |
| #2 | Belgium | 2 | |
| #3 | Germany | 2 | |
| #4 | EPO (European Patent Office) | 2 | |
| #5 | United Kingdom | 1 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Environmental technology | |
| #3 | Mechanical elements | |
| #4 | Chemical engineering | |
| #5 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Tolsma Pieter Jarig Sjoerd | 3 |
| #2 | Nouwens F H C | 1 |
| #3 | Nouwens Franciscus Hendricus C | 1 |
| #4 | Huisman Klaas | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL9200705A | Valve. | |
| NL9002195A | Mixing system for pressurised combustible gas and air - uses rotary drum, half filled with water | |
| NL8702627A | Boiler. | |
| NL8602071A | Heating system with boiler - has draught interrupter with ejector at outlet for combustion gas | |
| NL8502377A | Heating device. | |
| DE1228786B | Device for lining metal pipes with a layer of ebonite or another compressible material |