| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | France | 4 | |
| #3 | United Kingdom | 4 | |
| #4 | Netherlands | 4 | |
| #5 | Canada | 3 | |
| #6 | Switzerland | 3 | |
| #7 | Denmark | 3 | |
| #8 | United States | 3 | |
| #9 | Austria | 2 | |
| #10 | Belgium | 2 | |
| #11 | Spain | 2 | |
| #12 | Italy | 2 | |
| #13 | Norway | 2 | |
| #14 | Sweden | 2 | |
| #15 | South Africa | 2 | |
| #16 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Environmental technology | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Fluid heaters | |
| #2 | Heat-exchange device details | |
| #3 | Climate change mitigation in buildings | |
| #4 | Making metal sheets | |
| #5 | Metal-working |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schiffelers Theodoor Gerardus | 4 |
| #2 | Giesen G | 4 |
| #3 | Deckers Jan H | 2 |
| #4 | Deckers Jan Hubertus | 2 |
| #5 | Schiffelers T G M | 2 |
| #6 | Schiffelers T | 1 |
| #7 | Schiffelers Theodoor G M | 1 |
| #8 | Giesen G J | 1 |
| #9 | Giesen Gerardus Johannes | 1 |
| #10 | Giesen Gerardus J | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL8200384A | Condensing boiler. | |
| NL7511806A | Method for manufacturing a heat exchanger element | |
| ZA7403889B | Boiler and elements therefor | |
| NL7401505A | Water heater with integral mantle - has gas heated fingers connected to boiler plate adjacent to reservoir tank | |
| DE2325497A1 | BOILERS, IN PARTICULAR GAS HEATED CENTRAL HEATING BOILERS | |
| GB1358119A | Hot water boilers | |
| CA982430A | Boiler and method of making same | |
| GB1381201A | Boilers |