| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Sweden | 5 | |
| #2 | Australia | 1 | |
| #3 | Canada | 1 | |
| #4 | Denmark | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Finland | 1 | |
| #7 | Greece | 1 | |
| #8 | Norway | 1 | |
| #9 | Portugal | 1 | |
| #10 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Thermal processes | |
| #3 | Mechanical elements | |
| #4 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | General building constructions | |
| #2 | Air-conditioning | |
| #3 | Pipes | |
| #4 | Chairs and beds |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hellstrom P-A | 3 |
| #2 | Hellstrom Per Anders | 3 |
| #3 | Hellstroem Per Anders | 3 |
| #4 | Karfalk G | 1 |
| #5 | Hellstroem Per A | 1 |
| #6 | Hellstrom Per A | 1 |
| #7 | Kaarfalk Goeran | 1 |
| Publication | Filing date | Title |
|---|---|---|
| SE8403382D0 | Device in the air apparatus of a ventilation duct system | |
| SE8106653L | Arrangement related to furniture legs provided with a shoe | |
| CA1158176A | Arrangement for damping and absorption of sound in rooms | |
| FI811002L | Anording for the absorption of an absorption avoid in local |