| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 9 | |
| #2 | Austria | 5 | |
| #3 | Belgium | 2 | |
| #4 | Switzerland | 2 | |
| #5 | United Kingdom | 1 | |
| #6 | Sweden | 1 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Mechanical elements | |
| #2 | Machine tools |
| # | Technology | |
|---|---|---|
| #1 | Nails | |
| #2 | Making forged metal products | |
| #3 | Making screws | |
| #4 | Punching metal |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hanfland Curt H | 12 |
| #2 | H Hanfland Curt | 6 |
| #3 | Curt H Hanfland | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3262481A | Self-locking slotted nut with deformed thread portion | |
| GB1002971A | Self-locking nut |