| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 4 | |
| #2 | Germany | 2 | |
| #3 | Austria | 1 | |
| #4 | Denmark | 1 | |
| #5 | United Kingdom | 1 | |
| #6 | Italy | 1 | |
| #7 | Norway | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Thermal processes | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Finishing work on buildings | |
| #2 | Structural elements | |
| #3 | General building constructions | |
| #4 | Air-conditioning | |
| #5 | Unspecified technologies | |
| #6 | Construction of roads |
| # | Name | Total Patents |
|---|---|---|
| #1 | Martinus Catrinus De Jonge | 4 |
| #2 | Jonge Martinus Catrinus De | 4 |
| #3 | De Jonge Martinus Catrinus | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB1222531A | Improvements in or relating to gratings |