| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 17 | |
| #2 | Austria | 7 | |
| #3 | Switzerland | 3 | |
| #4 | France | 3 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Materials and metallurgy | |
| #3 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Electrically-conductive connections | |
| #2 | Electric switches | |
| #3 | Working metallic powder | |
| #4 | Pistons and sealings | |
| #5 | Alloys | |
| #6 | Dynamo-electric machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schunk Ebe | 3 |
| #2 | Schlierbach Albert Heinrich | 1 |
| #3 | Schwalm Julius | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE442666C | Process for the production of carbon brushes for electrical machines or the like, in which these are first coked in an annealing furnace and then electrographitized by means of an electric current, and furnace for the exercise of the same |