| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Switzerland | 13 | |
| #2 | France | 7 | |
| #3 | United States | 5 | |
| #4 | Germany | 2 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Electrical machinery and energy | |
| #3 | Audio-visual technology | |
| #4 | Measurement | |
| #5 | Mechanical elements |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Special electric heating or lighting | |
| #3 | Special information storage | |
| #4 | Optical systems | |
| #5 | Measuring light | |
| #6 | Mechanical control devices |
| # | Name | Total Patents |
|---|---|---|
| #1 | Rolf Noack | 5 |
| #2 | Johannes Weise | 5 |
| #3 | Walter Hennig | 4 |
| #4 | Werner Hahn | 4 |
| #5 | Rudolf Kuhnert | 3 |
| #6 | Walter Hennig Paul | 2 |
| #7 | Karl Kromer | 2 |
| #8 | Karl Kroemer | 2 |
| #9 | Egon Kaiser | 1 |
| #10 | Hahn Erich | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1012475B | Photoelectric light meter with adjustable photocurrent | |
| US2893301A | Photographic lens shutter with a braking mechanism for the control of the exposure time | |
| US2815702A | Photographic shutters | |
| US2862429A | Reflex cameras | |
| US2894437A | Attachable rollfilm changing magazines | |
| US2831994A | Carbon support in arc lamp | |
| DE949418C | Carbon support with exchangeable contact cups |