US PATENT SUBCLASS 984 / 252
.~.~ Chord or note indicators, fixed or adjustable, for keyboard or fingerboards {G10G 1/02}

Current as of: June, 1999
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984 /   HD   MUSICAL INSTRUMENTS

250  DD  AIDS FOR MUSIC (metronomes G04F 5/02; teaching music G09B 15/00) {G10G} {4}
251  DD  .~ Means for the representation of music {G10G 1/00} {2}
252.~.~ Chord or note indicators, fixed or adjustable, for keyboard or fingerboards {G10G 1/02}