Number | Name | Date | Kind |
---|---|---|---|
3736587 | Bush et al. | May 1973 | |
3754192 | Palfreeman | Aug 1973 | |
3831116 | Davis, Jr. et al. | Aug 1974 | |
3852540 | Adler et al. | Jun 1971 | |
3855548 | Nandi et al. | Dec 1974 | |
3855556 | Hartmann | Dec 1974 | |
4100498 | Alsup et al. | Jul 1978 |
Entry |
---|
Hartmann et al.--"Wideband unidirectional interdigital surface wave transducers", IEEE Transactions on Sonics and Ultrasonics, vol. SU-19, No. 3, Jul. 1972; pp. 378-381. |