US PATENT SUBCLASS 379 / 187
.~ Connected to central office

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

177  DF  POLYSTATION LINE SYSTEM (I.E., PARTY LINE) {6}
187.~ Connected to central office

DEFINITION

Classification: 379/187

Connected to central office:

(under subclass 177) Subject matter wherein a polystation line is connected to a central switching office.