| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 4 | |
| #2 | United Kingdom | 3 | |
| #3 | United States | 3 | |
| #4 | Austria | 2 | |
| #5 | Belgium | 2 | |
| #6 | Germany | 2 | |
| #7 | Finland | 2 | |
| #8 | Netherlands | 1 | |
| #9 | Norway | 1 | |
| #10 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Civil engineering | |
| #4 | Furniture and games |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Unspecified technologies | |
| #3 | Scaffolding | |
| #4 | General building constructions | |
| #5 | Office furniture | |
| #6 | Doors and windows |
| # | Name | Total Patents |
|---|---|---|
| #1 | Offenbroich Adrian Gottfried | 13 |
| #2 | Adrian Gottfried Offenbroich | 3 |
| Publication | Filing date | Title |
|---|---|---|
| DE3101205A1 | Connecting device | |
| DE2406227A1 | DEVICE FOR THE RELEASABLE CONNECTION OF A CONNECTING LINK AND AT LEAST OF AN EXTENDED PART, USING A SCREW CONNECTION | |
| GB1281446A | Improvements in or relating to fastening devices | |
| GB1161319A | Improvements in or relating to Expanding Devices for Connecting Structural Elements |