| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Denmark | 3 | |
| #3 | France | 3 | |
| #4 | United Kingdom | 3 | |
| #5 | Japan | 3 | |
| #6 | Netherlands | 3 | |
| #7 | United States | 3 | |
| #8 | Sweden | 2 | |
| #9 | USSR (Union of Socialist Soviet Republics) | 2 | |
| #10 | Hungary | 1 | |
| #11 | Poland | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Special information storage | |
| #2 | Loudspeakers and microphones |
| # | Name | Total Patents |
|---|---|---|
| #1 | Kantschev Peter Kirilov | 5 |
| #2 | Kantschev P K | 4 |
| #3 | Kanchev Peter K | 3 |
| #4 | Peetaa Kirirofu Kanchiefu | 3 |
| #5 | Knchev Petr Kirilov | 2 |
| #6 | Kanchev Peter Kirilov | 1 |
| #7 | Kantschev Peter K | 1 |
| Publication | Filing date | Title |
|---|---|---|
| HU185860B | Electrostaticasound converter | |
| DK79081A | Electrostatic sound transducer | |
| JPS57125600A | Electrostatic acoustic converter |