| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 3 | |
| #2 | Brazil | 1 | |
| #3 | German Democratic Republic | 1 | |
| #4 | EPO (European Patent Office) | 1 | |
| #5 | France | 1 | |
| #6 | United Kingdom | 1 | |
| #7 | Japan | 1 | |
| #8 | Romania | 1 | |
| #9 | USSR (Union of Socialist Soviet Republics) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Electrical machinery and energy | |
| #2 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Magnets and transformers | |
| #2 | Loudspeakers and microphones |
| # | Name | Total Patents |
|---|---|---|
| #1 | Muller Rolf | 2 |
| #2 | Mueller Rolf | 2 |
| #3 | Myuller Rolf | 1 |
| #4 | Rorufu Miyuraa | 1 |
| #5 | Muller R | 1 |
| #6 | Roedel Friedrich Dr | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2812466A1 | INSULATING MATERIAL FOR HIGH VOLTAGE DEVICES OR DGL. | |
| DE2460851A1 | Multilayer loudspeaker diaphragm production method - is from fibrous materials whose thickness density and kind varies from layer to layer | |
| DE2450262A1 | Multi-layer fibrous loudspeaker membrane - has basic membrane reprocessed to add fibrous layers of different density and material |