| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 7 | |
| #2 | Germany | 3 | |
| #3 | France | 3 | |
| #4 | United States | 2 | |
| #5 | Finland | 1 | |
| #6 | Netherlands | 1 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Thermal processes | |
| #3 | Packaging and shipping | |
| #4 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Air-conditioning | |
| #3 | Fire-fighting | |
| #4 | Containers for goods storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Floyd Frederick | 7 |
| #2 | Floyd F | 1 |
| #3 | Floyd Frederich | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB2028128A | Air damper | |
| GB1542425A | Replaceable gas filter cells | |
| GB1593046A | Fire dampers | |
| GB1548378A | Fire dampers | |
| GB1453072A | Air filters | |
| GB1434382A | Gas filters | |
| GB925872A | Improvements in or relating to gas filters |