| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Denmark | 4 | |
| #2 | France | 3 | |
| #3 | Germany | 2 | |
| #4 | Spain | 2 | |
| #5 | Canada | 1 | |
| #6 | Switzerland | 1 | |
| #7 | United States | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Optics | |
| #3 | Measurement |
| # | Technology | |
|---|---|---|
| #1 | Special information storage | |
| #2 | Cameras | |
| #3 | Measuring electric variables |
| # | Name | Total Patents |
|---|---|---|
| #1 | Schlegel Karl Hermann Franz | 1 |
| #2 | Palle-Finn Beer | 1 |
| #3 | Beer Palle-Finn | 1 |
| #4 | Anneberg Peter Vilhelm Ingefri | 1 |
| #5 | Fono-Films Company Electrical | 1 |
| #6 | Beer Palle-Fin | 1 |
| Publication | Filing date | Title |
|---|---|---|
| ES147215A1 | A procedure with the corresponding apparatus to transform electrical oscillations. | |
| DE751368C | Drive device for portable sound film recording devices | |
| DE719982C | Method and device for recording tones | |
| US2136018A | Electrostatic mirror oscillograph | |
| ES110494A1 | Improvements in devices to put in motion heavy rotating bodies adapted to ensure the uniform movement of films. | |
| CA386340A | Electrostatic mirror oscillograph |