| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | Sweden | 3 | |
| #3 | Canada | 2 | |
| #4 | Finland | 2 | |
| #5 | Norway | 2 | |
| #6 | Switzerland | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Netherlands | 1 | |
| #9 | United States | 1 | |
| #10 | WIPO (World Intellectual Property Organization) | 1 | |
| #11 | South Africa | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport | |
| #2 | Machines | |
| #3 | Furniture and games | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Vehicle connections | |
| #2 | Motor vehicles | |
| #3 | Unspecified technologies | |
| #4 | Office furniture | |
| #5 | Vehicle wheels | |
| #6 | Buttons, pins and buckles |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bystedt Christer | 3 |
| #2 | Westerudd Staffan | 3 |
| #3 | Gustavsson Hans | 3 |
| #4 | Morichetto M | 2 |
| #5 | Persson Rickard | 2 |
| #6 | Krefting Herman Ulrik | 2 |
| #7 | Haufe W | 1 |
| #8 | Harald Persson Rickard | 1 |
| #9 | Farestam G | 1 |
| #10 | Magnusson Aake | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA1238064A | Dolly | |
| US4645226A | Dolly having an adjusting flexible or rigid connection | |
| FI794082A | Anordning vid slaepvagnskoppling | |
| GB1594689A | Trailer coupling | |
| ZA7208205B | Semi-trailer coupling |