| # | Country | Total Patents | |
|---|---|---|---|
| #1 | France | 10 | |
| #2 | Germany | 1 | |
| #3 | United Kingdom | 1 |
| # | Industry | |
|---|---|---|
| #1 | Civil engineering | |
| #2 | Transport | |
| #3 | Packaging and shipping | |
| #4 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Hydraulic engineering | |
| #2 | Motor vehicles | |
| #3 | Machines for liquids | |
| #4 | Railway bodies | |
| #5 | Containers for goods storage |
| Publication | Filing date | Title |
|---|---|---|
| GB277993A | Improvements in apparatus for the automatic coupling of trailers | |
| DE477016C | Trailer coupling for semi-trailer |