| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Canada | 3 | |
| #2 | United States | 3 | |
| #3 | Germany | 2 | |
| #4 | Brazil | 1 | |
| #5 | EPO (European Patent Office) | 1 | |
| #6 | France | 1 | |
| #7 | United Kingdom | 1 | |
| #8 | Hong Kong | 1 | |
| #9 | Republic of Korea | 1 |
| # | Industry | |
|---|---|---|
| #1 | Basic communication technologies | |
| #2 | Audio-visual technology | |
| #3 | Consumer goods | |
| #4 | Telecommunications |
| # | Technology | |
|---|---|---|
| #1 | Amplification control | |
| #2 | Stereophonic systems | |
| #3 | Electrophonic musical instruments | |
| #4 | Transmission | |
| #5 | Special information storage | |
| #6 | Resonators |
| # | Name | Total Patents |
|---|---|---|
| #1 | Burwen Richard S | 14 |
| Publication | Filing date | Title |
|---|---|---|
| KR20070085479A | Unnatural reverberation | |
| CA964338A | Variable bandpass dynamic noise filter | |
| US3732371A | Wide dynamic range noise masking compandor | |
| US2695337A | Power audio amplifier |