| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 4 | |
| #2 | Denmark | 3 | |
| #3 | Austria | 2 | |
| #4 | Canada | 2 | |
| #5 | Spain | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machines | |
| #2 | Machine tools | |
| #3 | Mechanical elements | |
| #4 | Consumer goods |
| # | Technology | |
|---|---|---|
| #1 | Fillers | |
| #2 | Thread cutting | |
| #3 | Nails | |
| #4 | Certain plastics | |
| #5 | Buttons, pins and buckles | |
| #6 | Shaping of plastics |
| # | Name | Total Patents |
|---|---|---|
| #1 | Lehre Frithjof | 7 |
| #2 | Frithjof Lehre | 4 |
| Publication | Filing date | Title |
|---|---|---|
| ES151769A1 | Improvements in the automatic fixing nuts | |
| CA519335A | Thread protector for fastener-threads for buttons | |
| CA394002A | Self-locking nut |