| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 4 | |
| #2 | United Kingdom | 4 | |
| #3 | Switzerland | 2 | |
| #4 | Germany | 2 | |
| #5 | Austria | 1 | |
| #6 | Finland | 1 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Control | |
| #2 | Mechanical elements | |
| #3 | Thermal processes | |
| #4 | Machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Arca Regulatorer Aktiebolaget | 2 |
| #2 | Ragnar Carlstedt | 2 |
| Publication | Filing date | Title |
|---|---|---|
| GB235026A | Improvements in and relating to regulating devices | |
| GB219021A | Method of and apparatus for humidifying air | |
| GB197682A | Improvements in connection with filters for use in apparatus for regulating physical conditions such as speed or pressure | |
| US1460746A | Steam trap | |
| GB136540A | Improvements in Steam Traps. | |
| DE336305C | Automatic regulation device |