| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 4 | |
| #2 | France | 4 | |
| #3 | United States | 4 | |
| #4 | Canada | 3 | |
| #5 | Netherlands | 3 | |
| #6 | Norway | 3 | |
| #7 | Sweden | 3 | |
| #8 | Australia | 2 | |
| #9 | Belgium | 2 | |
| #10 | Denmark | 2 | |
| #11 | United Kingdom | 2 | |
| #12 | Switzerland | 1 | |
| #13 | German Democratic Republic | 1 | |
| #14 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology | |
| #2 | Surface technology and coating |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones | |
| #2 | Layered products |
| # | Name | Total Patents |
|---|---|---|
| #1 | Manger Josef Wilhelm | 11 |
| #2 | Manger Josef W | 7 |
| #3 | Manger J W | 3 |
| #4 | Yoozefu Buiruherumu Mangaa | 1 |
| #5 | Wilhelm Manger Josef | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DE2725346A1 | SPEAKER | |
| DE2500397A1 | MEMBRANE FOR ELECTROACOUSTIC CONVERTER SYSTEMS | |
| GB1435555A | Electroacoustic transducers and diaphragms therefor | |
| US3686446A | Push-pull moving coil loudspeaker having electromagnetic centering means |