| # | Country | Total Patents | |
|---|---|---|---|
| #1 | EPO (European Patent Office) | 4 | |
| #2 | Denmark | 3 | |
| #3 | Norway | 2 | |
| #4 | Switzerland | 1 | |
| #5 | Germany | 1 | |
| #6 | Finland | 1 | |
| #7 | France | 1 | |
| #8 | Netherlands | 1 | |
| #9 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Audio-visual technology | |
| #3 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frankowski Guenter | 10 |
| #2 | Behrendt Horst | 2 |
| #3 | Frankowski Gunter | 1 |
| #4 | Frankowski G | 1 |
| #5 | Niehausmeier Uwe | 1 |
| Publication | Filing date | Title |
|---|---|---|
| EP0310004A2 | Casing | |
| EP0253055A1 | Housing for instalment into switch boards | |
| EP0198224A1 | Housing | |
| EP0078405A2 | Panel housing | |
| CH607661A5 | Screw-type cable entry with strain relief | |
| DE2547914A1 | Cable connector with tension relief - has ring seal and clamping ring pressed by internal cone |