| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Germany | 2 | |
| #2 | EPO (European Patent Office) | 2 | |
| #3 | Netherlands | 2 | |
| #4 | Canada | 1 | |
| #5 | Switzerland | 1 | |
| #6 | Japan | 1 | |
| #7 | United States | 1 | |
| #8 | WIPO (World Intellectual Property Organization) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic communication technologies | |
| #2 | Electrical machinery and energy | |
| #3 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Amplifiers | |
| #2 | Amplification control | |
| #3 | Loudspeakers and microphones | |
| #4 | AC and DC conversion devices | |
| #5 | Magnets and transformers |
| # | Name | Total Patents |
|---|---|---|
| #1 | Hoeglund Lennart Harry Erik | 6 |
| #2 | Hoeglund Lennart H E | 2 |
| #3 | Renaruto Harii Eritsuku Heegur | 1 |
| Publication | Filing date | Title |
|---|---|---|
| WO8300589A1 | Electrical converter | |
| US4262262A | Electric amplifier | |
| CA1101944A | Electric amplifier | |
| DE2701463A1 | Amplifier circuit with parallel amplifier stages - includes amplifying element and two gates blocking passage of signal outside threshold values | |
| CH620555A5 | Electrical amplifier | |
| NL7700149A | Amplifier circuit with parallel amplifier stages - includes amplifying element and two gates blocking passage of signal outside threshold values |