| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 8 | |
| #2 | United States | 5 | |
| #3 | Germany | 1 | |
| #4 | France | 1 | |
| #5 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Machine tools | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Metal wire processing | |
| #2 | Machines for making clocks | |
| #3 | Making metal sheets |
| # | Name | Total Patents |
|---|---|---|
| #1 | Perrenoud Rene | 8 |
| #2 | Rene Perrenoud | 6 |
| #3 | Rune Perunoo | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US4261396A | Machine for straightening metal wire | |
| CH608394A5 | Machine for the manufacture of shape (former, form) springs | |
| US3613420A | Automatic machine for the manufacture of planar steel wire springs | |
| US3608592A | Automatic machine for making steel wire springs | |
| US3600923A | Automatic machine for the manufacture of steel wire springs | |
| US3612113A | Automatic machines for making steel wire springs |