| Number | Name | Date | Kind |
|---|---|---|---|
| D. 200051 | Wassrmann | Jan 1965 | |
| 4311874 | Wallace, Jr. | Jan 1982 | |
| 4421957 | Wallace, Jr. | Dec 1983 | |
| 4559642 | Miyaji et al. | Dec 1985 | |
| 4653606 | Flanagan | Mar 1987 | |
| 5058170 | Kanamori et al. | Oct 1991 | |
| 5581620 | Brandstein et al. | Dec 1996 | |
| 5657393 | Crow | Aug 1997 | |
| 5848172 | Allen et al. | Dec 1998 | |
| 5862240 | Ohkubo et al. | Jan 1999 |
| Number | Date | Country |
|---|---|---|
| 44 45 549 | Mar 1996 | DE |
| 781070 | Jun 1997 | EP |
| Entry |
|---|
| A Microphone Array for multimedia Workstations: Journal Audio Engineering Society, vol. 44, No. 5, May 1996, pp. 365-372. |
| “Design of Logarithmically Spaced Constant-Directivity Transducer Attays” Journal Audio Engineering Society, vol. 44, No. 6, Jun. 1996, pp. 497-507. |