| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | United Kingdom | 2 | |
| #3 | Canada | 1 | |
| #4 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machines | |
| #3 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Unspecified technologies | |
| #3 | Presses |
| # | Name | Total Patents |
|---|---|---|
| #1 | Dyckerhoff Adolf | 1 |
| #2 | Adolf Dyckerhoff | 1 |
| #3 | Neff Franz | 1 |
| Publication | Filing date | Title |
|---|---|---|
| GB373608A | An improved self-locking nut and a process for its manufacture | |
| GB349541A | Improved lock nut | |
| CA290222A | Screw lock |