| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 7 | |
| #2 | United Kingdom | 5 | |
| #3 | France | 4 | |
| #4 | Italy | 3 | |
| #5 | Austria | 1 | |
| #6 | Belgium | 1 | |
| #7 | Switzerland | 1 | |
| #8 | Sweden | 1 | |
| #9 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Dynamo-electric machines | |
| #2 | Electric motor controls | |
| #3 | Electrically-conductive connections | |
| #4 | Measuring electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Serev Georgi Petrov | 2 |
| #2 | Assenov Jontschev Dipl-Ing Bor | 2 |
| #3 | Dundarov Pantscho Georgiev Dip | 2 |
| #4 | Kondratenko Ivan Jakovlev Dipl | 2 |
| #5 | Pantscho Georgiev Dundarov | 2 |
| #6 | Georgi Petrov Serev | 2 |
| #7 | Ivan Jakovlev Dipl-Ing Kondrat | 1 |
| #8 | Philipowa Wesirewa Dipl-Ing Yo | 1 |
| #9 | Kondratenko I J | 1 |
| #10 | Kontratenko I | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US3900779A | Starting and regulator device for asynchronous motors with a wound rotor | |
| GB1356007A | Electric machines with outer rotors | |
| GB1357587A | Electric machines | |
| GB1284769A | Electromagnetic measuring devices | |
| GB1240902A | Stator windings for three-phase two-speed induction motors |