| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 13 | |
| #2 | United Kingdom | 3 | |
| #3 | Germany | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Chemical engineering | |
| #3 | Environmental technology | |
| #4 | Thermal processes |
| # | Name | Total Patents |
|---|---|---|
| #1 | Groendal Gustaf | 12 |
| #2 | Grondal Gustaf | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB142493A | Apparatus for lixiviating granular or pulverulent material | |
| GB140776A | Improvements in sieves | |
| GB137930A | Apparatus for lixiviating and washing granular or pulverulent ore |