Assertion: acoustic microscope | /r/CapableOf | follow the dunn and fry experiments
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text: The scientific literature shows very little progress toward an acoustic microscope following the Dunn and Fry experiments up until about 1970 when two groups of activity emerged, one headed by C.F. Quate (Stanford University) and the other by A. Korpel and L.W. Kessler (Zenith Radio Research Labs).