| # | Industry | |
|---|---|---|
| #1 | Optics | |
| #2 | Audio-visual technology | |
| #3 | Basic communication technologies | |
| #4 | Electrical machinery and energy | |
| #5 | Environmental technology |
| # | Technology | |
|---|---|---|
| #1 | Spectacles | |
| #2 | Loudspeakers and microphones | |
| #3 | Reduction of greenhouse gas emissions | |
| #4 | Amplification control | |
| #5 | Batteries | |
| #6 | Amplifiers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Fischer Rudolf | 6 |
| #2 | Konzelmann Kurt | 4 |
| #3 | Hoehler Dipl-Ing Albert | 2 |
| #4 | Roehler Heinz | 1 |
| #5 | Galster Edelgard Wendt Geb | 1 |
| #6 | Huizinga Viktor Alberts Van | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE1161599B | Switching device for small electrical devices operated with a replaceable energy source (battery) | |
| DE1016755B | Hard-of-hearing device in the form of glasses | |
| DE1041087B | Electromagnetic hearing device, in particular hearing glasses | |
| DE1041086B | Hearing glasses with distributed arrangement of the parts of an electroacoustic system in the glasses frame and the glasses temples |