| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Spain | 7 | |
| #2 | Austria | 4 | |
| #3 | United Kingdom | 4 | |
| #4 | Switzerland | 3 | |
| #5 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Water treatment |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dervaux Alfred | 12 |
| Publication | Filing date | Title |
|---|---|---|
| GB189821274A | A New Process of and Means for Cleansing Filter-material. | |
| GB189706511A | Improvements in Means for the Purification of Water in Open Vessels. | |
| US688721A | Method of purifying water. | |
| GB189624474A | Method and Apparatus for Purifying Water by Boiling it in Open Vessels. | |
| GB189403684A | An Improved Mode of and Apparatus for Effecting the Separation of Water from its Calcareous Impurities. |