| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 28 | |
| #2 | Switzerland | 5 |
| # | Industry | |
|---|---|---|
| #1 | Basic materials chemistry | |
| #2 | Chemical engineering | |
| #3 | Materials and metallurgy | |
| #4 | Foods and drinks | |
| #5 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Soaps | |
| #2 | Separation | |
| #3 | Alkali metal compounds | |
| #4 | Chemical or physical processes | |
| #5 | Dairy products | |
| #6 | Candles | |
| #7 | Presses | |
| #8 | Non-metallic elements | |
| #9 | Dry-cleaning fibers | |
| #10 | Nitrogenous fertilisers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Adolf Welter Dr | 5 |
| Publication | Filing date | Title |
|---|---|---|
| DE425335C | Preservation of carbonate, bicarbonate, carbamic acid ammonia, etc. like |