| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 12 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Mechanical elements | |
| #3 | Chemical engineering | |
| #4 | Control | |
| #5 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Sewers | |
| #2 | Roof coverings | |
| #3 | Venting or aerating devices | |
| #4 | Separation | |
| #5 | Systems controlling non-electric variables | |
| #6 | Lubricating | |
| #7 | Installations for obtaining water | |
| #8 | Steam generation | |
| #9 | Domestic plumbing installations |
| Publication | Filing date | Title |
|---|---|---|
| GB940462A | Wall hydrant | |
| GB917384A | Grease intercepter and carrier frame therefor | |
| GB936687A | Improved roof drain | |
| GB915410A | Improved drainage structure | |
| GB939524A | Sewer valve | |
| GB907507A | Oil interceptor | |
| GB904294A | Grease interceptor | |
| GB917127A | Roof drain | |
| GB908422A | Non-clog flow control device | |
| GB938017A | Improved surface drain and grating therefor | |
| GB920463A | Adjustable surface drain | |
| GB916105A | Drainage structure |