| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 8 | |
| #2 | Canada | 5 | |
| #3 | Switzerland | 4 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Special information storage |
| # | Name | Total Patents |
|---|---|---|
| #1 | Poulsen Arnold | 15 |
| #2 | Petersen Axel Carl Georg | 9 |
| #3 | Carl Georg Petersen Axel | 4 |
| #4 | Petersen Axel Carl George | 3 |
| #5 | Arnold Poulsen | 2 |
| #6 | Petersen Exel Carl Georg | 1 |
| Publication | Filing date | Title |
|---|---|---|
| CA281520A | Sound mechanism | |
| CA291294A | Film uniform movement device | |
| CA269296A | Selenium cell device | |
| CA449413A | Reproduction film for reproduction of sound and process for recording the sound | |
| CA270591A | Method of recording sound waves on photographic films |