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All Patents in class 340/870.24
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
2,020,548	Nov. 12, 1935	R.E. Harrison	Testing Apparatus for Surface Finish	grinding machines
3,258,667	Jun. 28, 1966	J. Steranka, Jr., J.O. McDonough	Phase Shift Decoder for a Servo Control	electronic circuitry and apparatus

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