Number | Name | Date | Kind |
---|---|---|---|
3274828 | Pulvari | Sep 1966 | |
3427876 | Steele et al. | Feb 1969 | |
3888115 | Schwartz | Jun 1975 | |
4096740 | Sallee | Jun 1978 | |
4100811 | Cullen et al. | Jul 1978 | |
4216401 | Wagner | Aug 1980 |
Entry |
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Publication "A Small Sized Mechanical-Acoustic Pressure-Frequency Transducer" by P. V. Novitskii et al., Instrument and Control, 5/1971. |