| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 7 | |
| #2 | WIPO (World Intellectual Property Organization) | 3 | |
| #3 | Australia | 2 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Civil engineering | |
| #3 | Machines | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Air-conditioning | |
| #2 | Fire-fighting | |
| #3 | Unspecified technologies | |
| #4 | Venting or aerating devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Perrin Richard | 10 |
| Publication | Filing date | Title |
|---|---|---|
| GB0903565D0 | Damper with spring clutch to permit or prevent movement of the damper blade by relative position of spring legs on the spring clutch. | |
| GB0306178D0 | Air flow controller and fire damper in an air flow duct | |
| GB0219297D0 | Fire damper | |
| AU2084702A | Air flow controller and fire damper in an air flow duct | |
| GB0118631D0 | Air flow controller and fire damper in an air flow duct | |
| GB0029381D0 | Air flow controller and fire damper in air flow duct |