| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 24 | |
| #2 | Switzerland | 5 |
| # | Technology | |
|---|---|---|
| #1 | Rare-earth metal compounds | |
| #2 | Non-metallic elements | |
| #3 | Separation | |
| #4 | Ammonia or cyanogen | |
| #5 | Soaps | |
| #6 | Alkali metal compounds | |
| #7 | Preservation of human bodies | |
| #8 | Chemical or physical processes | |
| #9 | Compounding ingredients | |
| #10 | Inorganic compounds |
| # | Name | Total Patents |
|---|---|---|
| #1 | Max Buchner Dr | 5 |
| #2 | Gewecke Dr-Ing Fritz | 1 |
| #3 | Gewecke Dr Fritz | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE446162C | Process for the production of durable emulsions, suspensions and colloid dispersions | |
| DE403858C | Filtering device | |
| DE409686C | Device for filtering, consisting of a Filtratabfuehrungskoerper, a filter chamber and an intermediate filter | |
| DE402252C | Filtering device |