US PATENT SUBCLASS 379 / 249
.~.~.~ For nuisance call mitigation

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

242  DF  CENTRALIZED SWITCHING SYSTEM {15}
245  DF  .~ Identification {1}
246  DF  .~.~ Of line or trunk {3}
249.~.~.~ For nuisance call mitigation

DEFINITION

Classification: 379/249

For nuisance call mitigation:

(under subclass 246) Subject matter for identifying a calling station which is a source of undesired, annoying, or abusive calls.