Number | Date | Country | Kind |
---|---|---|---|
56-73264[U] | May 1981 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3303279 | Tinklepaugh | Feb 1967 | |
4042791 | Wiseman | Aug 1977 | |
4210778 | Sakurai | Jul 1980 | |
4210784 | Phillips | Jul 1980 | |
4310307 | Bellisario | Jan 1982 |
Number | Date | Country |
---|---|---|
484704 | May 1938 | GBX |
827306 | Feb 1960 | GBX |
Entry |
---|
"Loudspeaker Design", Wireless World, E. J. Jordan, Feb. 1956, p. 75. |