| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 4 | |
| #2 | Denmark | 3 | |
| #3 | France | 3 | |
| #4 | Canada | 2 | |
| #5 | Switzerland | 1 | |
| #6 | Germany | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy |
| # | Technology | |
|---|---|---|
| #1 | Dynamo-electric machines |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kall Oscar E | 2 |
| #2 | Kaell Oscar Ebbe | 1 |
| #3 | Ebbe Kall Oscar | 1 |
| #4 | Oscar Ebbe Kall | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2927263A | Compounded internal pole synchronous generator | |
| GB783686A | Improvements in or relating to compounded rotating pole synchronous machines | |
| CA588897A | Compounded single-phase or polyphase alternating current generators | |
| CA601902A | Compounded internal pole synchronous machines |