| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Canada | 4 | |
| #3 | United States | 3 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machine tools | |
| #3 | Machines |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Thread cutting | |
| #3 | Making forged metal products | |
| #4 | Unspecified technologies |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bergstrom William A | 7 |
| Publication | Filing date | Title |
|---|---|---|
| GB530768A | Improvements in or relating to lock nuts or nut blanks | |
| GB533013A | Improvements in or relating to methods of making lock nuts | |
| US2164305A | Nut lock blank | |
| US2164304A | Nut and method of making the same | |
| GB484379A | Improved method of making spring lock nuts | |
| GB440710A | An improved spring lock nut | |
| US2035859A | Method of making spring lock nuts | |
| CA370700A | Spring lock nut | |
| CA396838A | Nut lock blank | |
| CA396837A | Lock nut | |
| CA356951A | Spring lock nut |