US PATENT SUBCLASS 360 / 77.07
.~.~.~.~ By tracking signal recorded on or immediately beneath surface

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

69  DF  AUTOMATIC CONTROL OF A RECORDER MECHANISM {3}
75  DF  .~ Controlling the head {3}
77.01  DF  .~.~ Track centering {2}
77.02  DF  .~.~.~ Rotary carrier {5}
77.07.~.~.~.~ By tracking signal recorded on or immediately beneath surface {2}
77.08  DF  .~.~.~.~.~> Distinct servo sector
77.11  DF  .~.~.~.~.~> Continuous servo signal

DEFINITION

Classification: 360/77.07

By tracking signal recorded on or immediately beneath surface:

(under subclass 77.02) Subject matter for processing a signal reproduced from the record carrier for controlling transducer head motion and which signal is distinct from a reproduced information signal.