| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 16 | |
| #2 | Germany | 7 | |
| #3 | United Kingdom | 4 | |
| #4 | Austria | 2 | |
| #5 | Switzerland | 1 | |
| #6 | Finland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Materials and metallurgy | |
| #2 | Chemical engineering | |
| #3 | Foods and drinks | |
| #4 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Non-metallic elements | |
| #2 | Separation | |
| #3 | Compressed gas holders | |
| #4 | Chemical or physical processes | |
| #5 | Sucrose production | |
| #6 | Iron and steel production |
| # | Name | Total Patents |
|---|---|---|
| #1 | Norit Maatschappij Algemeene | 1 |
| #2 | Adolf Sauer Johan Nicolaas | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB273761A | Improvements in the process of producing activated carbon | |
| DE504636C | Active coal production | |
| DE486075C | Method for improving the adsorption capacity of active charcoal | |
| GB206862A | Improvements in the process of producing activated carbon | |
| GB208555A | Improvements in the process of producing decolorizing carbon | |
| GB189148A | Improvements in the process of producing decolorizing carbon | |
| DE454407C | Refinement of active coal |