US PATENT SUBCLASS 369 / 223
.~.~.~ By lead screw

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}
219  DF  .~.~ With drive transverse to storage track during storage or retrieval {4}
223.~.~.~ By lead screw

DEFINITION

Classification: 369/223

By lead screw:

(under subclass 219) Subject matter wherein the driving force is applied to the transducer assembly, or support therefor, by a rotating tubular element having an externally extending element of helical configuration.