| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Germany | 5 | |
| #3 | Austria | 3 | |
| #4 | Canada | 3 | |
| #5 | Spain | 3 | |
| #6 | United Kingdom | 3 | |
| #7 | France | 2 | |
| #8 | Netherlands | 2 | |
| #9 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | AC and DC conversion devices | |
| #2 | Electric motor controls |
| # | Name | Total Patents |
|---|---|---|
| #1 | Etter Marcel | 12 |
| #2 | Marcel Etter | 4 |
| Publication | Filing date | Title |
|---|---|---|
| US3879651A | Undulator | |
| GB1083530A | Improvements in or relating to an inverter | |
| GB992828A | Improvements in or relating to inverters | |
| CA802394A | Inverter frequency and conductivity control | |
| CA804725A | Inverter | |
| CA790738A | Electrical generator |