US PATENT SUBCLASS 369 / 218
.~.~ Having groove engaging driving element

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

176  DF  DYNAMIC MECHANISM SUBSYSTEM {8}
215  DF  .~ Having power driven transducer assembly {6}
218.~.~ Having groove engaging driving element

DEFINITION

Classification: 369/218

Having groove engaging driving element:

(under subclass 215) Subject matter wherein a groove engaging element, distinct from any information coupling element, provides all tracking force to the transducer assembly.

(1) Note. Examples of the subject matter classified in this subclass include unmodulated grooves and groove coupling elements transmitting only tracking motion.