US PATENT SUBCLASS 381 / 101
.~ Automatic tone control

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

98  DF  INCLUDING FREQUENCY CONTROL {3}
101.~ Automatic tone control {1}
102  DF  .~.~> With amplitude control

DEFINITION

Classification: 381/101

Automatic tone control:

(under subclass 98) Subject matter having a control used to alter automatically the frequency response of the system so that a listener can be provided the most pleasing sound.

SEE OR SEARCH CLASS

333, Wave Transmission Lines and Networks,

28, and 167-212 for tone control, per se.

455, Telecommunications,

267, for tone control in a radio receiver.