US PATENT SUBCLASS 369 / 134
.~.~.~ With particular amplification characteristic or signal control circuitry (e.g., muting)

Current as of: June, 1999
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369 /   HD   DYNAMIC INFORMATION STORAGE OR RETRIEVAL

99  DF  SPECIFIC DETAIL OF INFORMATION HANDLING PORTION OF SYSTEM {4}
127  DF  .~ Mechanical modification or sensing of storage medium {6}
128  DF  .~.~ With electrical information signal processing {5}
134.~.~.~ With particular amplification characteristic or signal control circuitry (e.g., muting)

DEFINITION

Classification: 369/134

With particular amplification characteristic or signal control circuitry (e.g., muting):

(under subclass 128) Subject matter having either (a) an

amplifier with a particular characteristic (e.g., band-pass), or (b) circuitry for control of a characteristic of the electrical information signal.

(1) Note. A nominally recited amplifier, of itself, is insufficient for classification herein.

(2) Note. Particular control circuitry may be by a switch or a circuitry subsystem, such as muting.