US PATENT SUBCLASS 369 / 80
.~ Particular acoustical structure (e.g., baffle)

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.~ Particular acoustical structure (e.g., baffle) {2}
81  DF  .~.~> Having collapsible or expandable acoustic path
82  DF  .~.~> Having parallel acoustic paths

DEFINITION

Classification: 369/80

Particular acoustical structure (e.g., baffle):

(under subclass 75.1) Subject matter including structure which mechanically modifies sound waves.

(1) Note. This is primarily a collection of old style mechanical phonographs with sound amplifying or modifying structure (e.g., trumpets, baffles, etc.).