Number | Name | Date | Kind |
---|---|---|---|
3588355 | Holm | Jun 1971 | |
3983333 | Allison | Sep 1976 | |
4051919 | Buettner | Oct 1977 | |
4256922 | Gorike | Mar 1981 | |
4266092 | Barker, III | May 1981 | |
4578809 | Eberbach | Mar 1986 |
Entry |
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Brociner, "The Trimensional Stereo Speaker System", Audio, Jun. 1959, pp. 21-24. |