| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | United Kingdom | 2 | |
| #3 | United States | 2 |
| # | Industry | |
|---|---|---|
| #1 | Thermal processes | |
| #2 | Civil engineering |
| # | Technology | |
|---|---|---|
| #1 | Domestic heating systems | |
| #2 | Air-conditioning | |
| #3 | Finishing work on buildings | |
| #4 | Fluid heaters |
| # | Name | Total Patents |
|---|---|---|
| #1 | Carl Grab | 2 |
| Publication | Filing date | Title |
|---|---|---|
| US2083905A | Air moistener | |
| GB444597A | Air moistener | |
| GB247864A | Air moistener with moisture-absorbing material, especially for central heating | |
| US1643844A | Air moistener |