| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 5 | |
| #2 | France | 4 | |
| #3 | United Kingdom | 2 |
| # | Industry | |
|---|---|---|
| #1 | Chemical engineering | |
| #2 | Materials and metallurgy | |
| #3 | Basic materials chemistry | |
| #4 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Separation | |
| #2 | Iron and steel production | |
| #3 | Windows or door furnishings | |
| #4 | Purifying gas composition |
| # | Name | Total Patents |
|---|---|---|
| #1 | Daenhardt Emil | 3 |
| #2 | Danhardt Emil | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB148800A | Filter for dry cleaning (separating the solids from) gases and vapours, more especially furnace gases | |
| GB148795A | Metallic filter for separating solid substances from gases and vapours, more especially furnace gases |