| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 2 | |
| #2 | France | 2 | |
| #3 | United States | 2 | |
| #4 | Germany | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | Spain | 1 | |
| #7 | Japan | 1 | |
| #8 | Netherlands | 1 | |
| #9 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Transport |
| # | Technology | |
|---|---|---|
| #1 | Motor vehicles | |
| #2 | Vehicle connections | |
| #3 | Vehicle suspension arrangements |
| # | Name | Total Patents |
|---|---|---|
| #1 | Wasservogel Francois | 5 |
| #2 | Batsusaafuoogeru Furansowa | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4348035A | Towing attachments for attaching trailers to vehicles | |
| EP0007284A1 | Trailer hitch for vehicles, particularly for motor cars | |
| US4230340A | Trailer for coupling to road vehicles | |
| CA1100158A | Collapsible trailer for motor vehicles |