US PATENT SUBCLASS 379 / 184
.~.~ Lockout

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

177  DF  POLYSTATION LINE SYSTEM (I.E., PARTY LINE) {6}
182  DF  .~ Automatic or unattended {2}
184.~.~ Lockout

DEFINITION

Classification: 379/184

Lockout:

(under subclass 182) Subject matter for blocking access to a line already in use.