US PATENT SUBCLASS 379 / 189
.~ Fraud or improper use mitigating or indication (e.g., "blue box", "black box")

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

188  DF  CALL OR TERMINAL ACCESS ALARM OR CONTROL {5}
189.~ Fraud or improper use mitigating or indication (e.g., "blue box", "black box")

DEFINITION

Classification: 379/189

Fraud or improper use mitigating or indication (e.g., "blue box", "black box"):

(under subclass 188) Subject matter to defeat or indicate an attempt to override the call range restriction without a proper authorization or control function.