| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Belgium | 4 | |
| #2 | Netherlands | 4 | |
| #3 | Germany | 3 | |
| #4 | United Kingdom | 3 | |
| #5 | France | 2 | |
| #6 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Agriculture |
| # | Technology | |
|---|---|---|
| #1 | Doors and windows | |
| #2 | Indexing scheme relating to hinges | |
| #3 | Wing fittings | |
| #4 | Swimming pools | |
| #5 | Horticulture | |
| #6 | General building constructions | |
| #7 | Structural elements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Visser Frederikus Theodorus La | 2 |
| #2 | Visser Frederikus Theodorus | 1 |
| #3 | Visser Frederiks T L | 1 |
| Publication | Filing date | Title |
|---|---|---|
| NL7908229A | SELF-BEARING GAS-PROOF WALL CONSTRUCTION. | |
| DE2913225A1 | TILTING WALL | |
| NL7901983A | Panel with counterweight. | |
| NL7806911A | Wall panel mounting column - comprises angular section uprights joined together by transverse plates spaced at intervals |