US PATENT SUBCLASS 369 / 128
.~.~ With electrical information signal processing

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.~.~ With electrical information signal processing {5}
129  DF  .~.~.~> From information modulated oscillator
130  DF  .~.~.~> Sensing of elastic deformation or relaxation of storage medium (e.g., skid type)
131  DF  .~.~.~> Bidirectional information flow (e.g., record/replay switching)
132  DF  .~.~.~> Recording {1}
134  DF  .~.~.~> With particular amplification characteristic or signal control circuitry (e.g., muting)

DEFINITION

Classification: 369/128

With electrical information signal processing:

(under subclass 127) Subject matter including some detail of handling or control of the electrical signal input to or output of the transducing assembly.

(1) Note. Mere mention of connecting means, or wires along the tone arm is not classifiable here.