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| All Patents in class 340/870.37 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,517,190 | May 14, 1996 | C.N. Gunn | Physical Measurement from changes in Reactance | measurement gauges | |
| 5,920,198 | Jul. 06, 1999 | S. Takahashi, M. Suzuki | Capacitance-Type Displacement Measuring Device | measurement gauges | |