Number | Name | Date | Kind |
---|---|---|---|
1485124 | Myres | Feb 1924 | |
3067833 | Bodenger | Dec 1962 | |
3108652 | Littmann | Oct 1963 | |
3109508 | Cefaly | Nov 1963 | |
3152659 | Littmann | Oct 1964 | |
3157246 | Howell | Nov 1964 | |
3179204 | Cefaly | Apr 1965 | |
3215224 | Machlup | Nov 1965 | |
3224526 | Weber | Dec 1965 | |
3276536 | Littmann | Oct 1966 | |
3303903 | Speelman | Feb 1967 | |
3307650 | Howell | Mar 1967 | |
3472336 | Dahl | Oct 1969 | |
3515239 | Machlup et al. | Jun 1970 | |
3951230 | Littmann | Apr 1976 | |
4270627 | Hill | Jun 1981 |
Number | Date | Country |
---|---|---|
69226 | Dec 1976 | SUX |
Entry |
---|
A. B. Cohen, Hi-Fi Loudspeakers and Enclosures, Hayden Book Company, N.J., pp. 24-25, 56-58 and 83-85, (1968). |