Number | Date | Country | Kind |
---|---|---|---|
3907605 | Mar 1989 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3451260 | Thurstone | Jun 1969 | |
3755698 | Trott | Aug 1973 | |
3895188 | Ingraham | Jul 1975 | |
4241432 | Barber et al. | Dec 1980 | |
4528853 | Lerch et al. | Jul 1985 | |
4697579 | Wessels et al. | Oct 1987 | |
4893614 | Takayama et al. | Jan 1990 | |
4924858 | Katona | May 1990 |
Number | Date | Country |
---|---|---|
3505855 | Feb 1985 | DEX |
1393489 | May 1988 | SUX |
1405885 | Jun 1988 | SUX |
Entry |
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Reitz et al., "Two Parabolic Reflector Underwater Transducers", The Journal of the Acoustical Society of America, vol. 19, No. 1, Jan. 1947, pp. 35-42. |