US PATENT SUBCLASS 178 / 69.6
.~ Call

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

2 R  DF  SYSTEMS {21}
69.6.~ Call

DEFINITION

Classification: 178/69.6

(under subclass 2) Means for signaling a remote operator, who, in response to such signaling connects the recorder.

(1) Note. This subclass includes cross references of patents directed to other systems but including such means.