| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Austria | 2 | |
| #2 | Belgium | 2 | |
| #3 | Switzerland | 2 | |
| #4 | Denmark | 2 | |
| #5 | France | 2 | |
| #6 | United Kingdom | 2 | |
| #7 | Italy | 2 | |
| #8 | Norway | 2 | |
| #9 | United States | 2 | |
| #10 | Canada | 1 | |
| #11 | Germany | 1 | |
| #12 | Finland | 1 | |
| #13 | Netherlands | 1 | |
| #14 | Portugal | 1 | |
| #15 | Sweden | 1 | |
| #16 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones |
| # | Name | Total Patents |
|---|---|---|
| #1 | Jacobsen Preben | 17 |
| #2 | Preben Jacobsen | 2 |
| #3 | Jamo Hi-Fi A S | 1 |
| #4 | Jacobsen P | 1 |
| Publication | Filing date | Title |
|---|---|---|
| DK309385D0 | Speaker unit with a cabinet and procedure for manufacturing a cover for the cabinet. | |
| DK47581A | Bass-reflex speaker system |