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Assignee: Mestra A.G.

Location: Reinach, CH
No. of patents: 1

Number	Title	Issue Date
4887023	Capacitive sensor and circuit for detecting contamination of guard electrode An apparatus for detecting contamination of a capacitive sensor, comprising a guard electrode surrounding a portion of the sensor, and a circuit for supplying an excitation signal to the sensor and an identical excitation signal to the guard electrode. Th...	12/12/1989