| # | Country | Total Patents | |
|---|---|---|---|
| #1 | United States | 6 | |
| #2 | WIPO (World Intellectual Property Organization) | 2 | |
| #3 | Australia | 1 | |
| #4 | Canada | 1 | |
| #5 | EPO (European Patent Office) | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones | |
| #2 | Stereophonic systems |
| # | Name | Total Patents |
|---|---|---|
| #1 | Polk Matthew S | 7 |
| #2 | Cambell Colin B | 2 |
| #3 | Campbell Colin B | 2 |
| #4 | Polk Matthew S Jr | 2 |
| #5 | Polk Matthews S Jr | 1 |
| #6 | Starobin Bradely M | 1 |
| Publication | Filing date | Title |
|---|---|---|
| US5696357A | Bass-reflex loudspeaker | |
| US5517573A | Ported loudspeaker system and method with reduced air turbulence | |
| US5475764A | Bandpass woofer and method | |
| US4903300A | Compact and efficient sub-woofer system and method for installation in structural partitions | |
| US4924963A | Compact and efficient sub-woofer system and method for installation in structural partitions | |
| US4759066A | Sound system with isolation of dimensional sub-speakers |