| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 7 | |
| #2 | Switzerland | 4 | |
| #3 | Austria | 1 | |
| #4 | Spain | 1 | |
| #5 | United Kingdom | 1 | |
| #6 | Norway | 1 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Environmental technology | |
| #3 | Thermal processes | |
| #4 | Machine tools | |
| #5 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Frenger Karl Gunnar | 10 |
| #2 | Karl Gunnar Frenger | 3 |
| Publication | Filing date | Title |
|---|---|---|
| US3947679A | Box- or channel shaped lighting fixture for liquid cooling | |
| GB1453061A | Lighting fixture having box or channel form | |
| CH571191A5 | Lighting fitting for tubular discharge lamps - has cooling channel between fitting housing welding ribs | |
| ES205880A1 | In panel for radiant heating or feeding systems. (Machine-translation by Google Translate, not legally binding) |