US PATENT SUBCLASS 340 / 572.1
.~.~.~ Detectable device on protected article (e.g., "tag")

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
568.1  DF  .~.~ Article placement or removal (e.g., anti-theft) {9}
572.1.~.~.~ Detectable device on protected article (e.g., "tag") {7}
572.2  DF  .~.~.~.~> Specified relationship between field and detection frequencies (e.g., nth order harmonics)
572.3  DF  .~.~.~.~> Deactivatable by means other than mere removal
572.4  DF  .~.~.~.~> Specified processing arrangement for detected signal
572.5  DF  .~.~.~.~> Having tuned resonant circuit
572.6  DF  .~.~.~.~> Having "soft" magnetic element (e.g., Permalloy)
572.7  DF  .~.~.~.~> Specified antenna structure
572.8  DF  .~.~.~.~> Specified device housing or attachment means {1}

DEFINITION

Classification: 340/572.1

Detectable device on protected article (e.g., "tag"):

(under subclass 568.1) Subject matter where there is a means on the object of surveillance to which the system is responsive.

(1) Note. For example, a magnet detectable device is affixed to the protected article.

(2) Note. A loop of a sensing circuit may be contained in the power connection of an electric appliance.

SEE OR SEARCH CLASS

70, Locks,

57.1, for a means attaching a named anti-theft signaling device onto a protected article.