Number | Name | Date | Kind |
---|---|---|---|
3876890 | Brown et al. | Apr 1975 | |
3939467 | Cook et al. | Feb 1976 | |
3958559 | Glenn et al. | May 1976 | |
4248090 | Glenn | Feb 1981 | |
4425525 | Smith et al. | Jan 1984 | |
4460841 | Smith et al. | Jul 1984 | |
4556814 | Ito et al. | Dec 1985 | |
4700575 | Geithman et al. | Oct 1987 | |
4794930 | Machida et al. | Jan 1989 |
Entry |
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Harrison et al., "Single-Transducer Electrode Design for Beam Shaping in Biomedical Ultrasound," IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, vol. UFFC-33, No. 3, May 1986. |