| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 15 | |
| #2 | United States | 4 | |
| #3 | United Kingdom | 3 |
| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Textiles and paper | |
| #3 | Basic communication technologies | |
| #4 | Materials and metallurgy | |
| #5 | Packaging and shipping |
| # | Technology | |
|---|---|---|
| #1 | Cameras | |
| #2 | Typewriters | |
| #3 | Closing and opening bottles | |
| #4 | Amplifiers | |
| #5 | Treatment of glass |
| # | Name | Total Patents |
|---|---|---|
| #1 | Burger Michael | 7 |
| #2 | Michael Burger | 4 |
| #3 | Erich Burger | 3 |
| #4 | Burger Dipl-Ing Erich | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US2953074A | Flash ignition for cameras | |
| US2952199A | Automatic regulator for lens diaphragms | |
| US2894439A | Tractive indicator for automatic aperture controllers | |
| US2838985A | Automatic exposure regulator for photographic apparatus | |
| GB728028A | Automatic exposure regulating apparatus more especially for cine cameras | |
| DE909294C | Automatic aperture control | |
| GB463899A | Improvements in photographic cameras with photoelectric exposure meters |