US PATENT SUBCLASS 84 / 424
.~.~.~ Plurality of manuals

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
*  DD  .~ General features {7}
423 R  DF  .~.~ Keyboards {12}
424.~.~.~ Plurality of manuals

DEFINITION

Classification: 84/424

Keyboards like those of a pipe-organ and couplers therefor.

(1) Note. Continue the search in subclass 1.17 of this class.