Number | Date | Country | Kind |
---|---|---|---|
9621898 | Oct 1996 | GBX |
Number | Name | Date | Kind |
---|---|---|---|
4126204 | Ogi et al. | Nov 1978 | |
4231445 | Johnson | Nov 1980 | |
5012890 | Nagi et al. | May 1991 | |
5025885 | Froeschle | Jun 1991 | |
5150417 | Stahl | Sep 1992 | |
5714721 | Gawronski et al. | Feb 1998 |
Number | Date | Country |
---|---|---|
2 045 578 | Oct 1980 | GBX |
Entry |
---|
M Colloms, "High Performance Loudspeakers", 4th edition, published 1991, Pentach Press, pp. 122-123. |