| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | United Kingdom | 4 | |
| #3 | United States | 4 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Fire-fighting | |
| #2 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Joseph Humblet | 4 |
| Publication | Filing date | Title |
|---|---|---|
| US2079212A | Valve | |
| GB428336A | Improvements in or relating to valves | |
| GB419026A | Improvements in fire extinguishers | |
| GB418110A | Improvements in fire extinguishing apparatus | |
| US2106430A | Extinguisher | |
| US2106376A | Fire protecting means | |
| US2066112A | Valve | |
| GB406112A | Improvements in rapid opening valves |