| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 5 | |
| #2 | Germany | 3 | |
| #3 | France | 2 | |
| #4 | Switzerland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Thermal processes |
| # | Technology | |
|---|---|---|
| #1 | Electrically-conductive connections | |
| #2 | Fluid heaters | |
| #3 | Special electric heating or lighting |
| Publication | Filing date | Title |
|---|---|---|
| DE404309C | Steel wire ring as theft protection for electric light bulbs | |
| DE404783C | Plug contact to prevent unauthorized power consumption | |
| DE406223C | Electric heater |