| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 6 | |
| #2 | Austria | 5 | |
| #3 | Belgium | 3 | |
| #4 | Germany | 3 | |
| #5 | United States | 3 | |
| #6 | United Kingdom | 2 | |
| #7 | Denmark | 1 | |
| #8 | France | 1 | |
| #9 | Sweden | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Machine tools | |
| #3 | Mechanical elements | |
| #4 | Engines, pumps and turbines |
| # | Technology | |
|---|---|---|
| #1 | Dynamo-electric machines | |
| #2 | Punching metal | |
| #3 | Electric motor controls | |
| #4 | Gearing | |
| #5 | Non-positive-displacement pumps | |
| #6 | Magnets and transformers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Welter Otto | 6 |
| #2 | Otto Welter | 4 |
| #3 | Hermann Jaun | 4 |
| #4 | Albert Klix | 1 |
| #5 | Welter O | 1 |
| #6 | Jaun H | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3560775A | Rotary magnetoelectric device | |
| FR1470893A | Transformer of mechanical energy into electrical energy and vice versa | |
| GB909901A | Improvements in or relating to methods and apparatus for producing, from strips, coils having substantially radial or oblique openings therein | |
| GB862979A | Method of and apparatus for producing from strip metal ringshaped bodies having radial slots | |
| US2758231A | Electrical commutator machine |