| # | Country | Total Patents | |
|---|---|---|---|
| #1 | Australia | 5 | |
| #2 | United States | 5 | |
| #3 | WIPO (World Intellectual Property Organization) | 3 | |
| #4 | Canada | 2 | |
| #5 | EPO (European Patent Office) | 2 | |
| #6 | Japan | 1 |
| # | Industry | |
|---|---|---|
| #1 | Audio-visual technology |
| # | Technology | |
|---|---|---|
| #1 | Loudspeakers and microphones |
| # | Name | Total Patents |
|---|---|---|
| #1 | Porrazzo Edward M | 17 |
| #2 | Orell-Porrazzo Karen Pamela | 9 |
| #3 | Stevenson Charles C G | 6 |
| #4 | Stevenson Charles | 2 |
| #5 | Porrazzo Edward | 1 |
| #6 | Orell-Porrazzo Karen P | 1 |
| Publication | Filing date | Title |
|---|---|---|
| JP2002204495A | Planar type electromagnetic transducer | |
| AU1213299A | Variable geometry electromagnetic transducer | |
| AU8786198A | Planar electromagnetic transducer | |
| US5872855A | Multiple voice coil, multiple function loudspeaker | |
| US5430805A | Planar electromagnetic transducer | |
| US5627903A | Variable geometry electromagnetic transducer | |
| AU4222293A | Planar electromagnetic transducer | |
| CA2161510A1 | Planar electromagnetic transducer |