| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United Kingdom | 5 | |
| #2 | Germany | 4 | |
| #3 | Sweden | 3 | |
| #4 | Japan | 2 | |
| #5 | United States | 2 | |
| #6 | Italy | 1 |
| # | Industry | |
|---|---|---|
| #1 | Consumer goods | |
| #2 | Audio-visual technology | |
| #3 | Civil engineering |
| # | Name | Total Patents |
|---|---|---|
| #1 | Bolin Gustav Georg Arne | 10 |
| #2 | Gusutafu Jiyorugu Arune Boorin | 2 |
| Publication | Filing date | Title |
|---|---|---|
| DE3424766A1 | RECEIVER FOR SOUND WAVES | |
| GB2062342A | System for improving acoustics | |
| GB1579394A | Transducer for radiating sound | |
| US3908503A | Device in stringed musical instruments | |
| GB1408895A | Stringed musical instruments | |
| GB1010173A | Improvements in and relating to pianos |