| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Netherlands | 6 | |
| #2 | France | 3 | |
| #3 | Germany | 1 | |
| #4 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Air-conditioning | |
| #2 | Roof coverings | |
| #3 | Domestic stoves | |
| #4 | Finishing work on buildings |
| # | Name | Total Patents |
|---|---|---|
| #1 | Avesaath Petrus Leonardus Van | 5 |
| #2 | Van Avesaath Petrus Leonardus | 3 |
| #3 | Rijpkema Hendrik Antoon Marie | 1 |
| #4 | Rijpkema Hendrik Antonius Mari | 1 |
| #5 | Rijpkema Hendrik Anton Marie | 1 |
| #6 | Avesaath | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE19850094A1 | Wall box for passage of air in and out of external wall | |
| NL1008524C1 | Grating system with frame having through passage for air flow | |
| NL1001572C1 | Gutter construction. | |
| NL1001562C1 | Ventilator grille for wall openings | |
| NL9500047A | Lockable ventilation grille. | |
| GB9313299D0 | Universal extraction hood | |
| NL8201379A | Gutter section with connector - has edge bent into sleeve accommodating protrusion on connector flange |