US PATENT SUBCLASS 379 / 223
.~.~ With operator assistance

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

219  DF  PLURAL EXCHANGE NETWORK OR INTERCONNECTION {6}
222  DF  .~ Toll center {1}
223.~.~ With operator assistance

DEFINITION

Classification: 379/223

With operator assistance:

(under subclass 222) Subject matter where the toll center has an operator to assist in completion of toll calls.