US PATENT SUBCLASS 369 / 81
.~.~ Having collapsible or expandable acoustic path

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

75.1  DF  WITH PARTICULAR CABINET STRUCTURE {6}
80  DF  .~ Particular acoustical structure (e.g., baffle) {2}
81.~.~ Having collapsible or expandable acoustic path

DEFINITION

Classification: 369/81

Having collapsible or expandable acoustic path:

(under subclass 80) Subject matter in which a portion of the acoustic structure defining the acoustic path is movable so as to vary a dimension of the acoustic path.

(1) Note. Typical structure include lid controlled folding horn, and telescoping horn sections for making compact.

SEE OR SEARCH CLASS

181, Acoustics,

178, 186, and 197 for similar subject matter of general utility.