US PATENT SUBCLASS 984 / 72
.~ Special tools or methods for the manufacture and maintenance of pianos {G10C 9/00}

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

50  DD  PIANOS {nonmusical aspects of toy pianos A63H 5/00; Aspects of automatic actuation subclasses 200+; Combinations of microphones, pick-ups or amplifiers with musical instruments subclasses 300+} {G10C} {4}
72.~ Special tools or methods for the manufacture and maintenance of pianos {G10C 9/00}