US PATENT SUBCLASS 984 / 345
.~.~.~ Switch arrangements, e.g., keyboards or mechanical swicthes peculiar to electrophonic musical instruments, etc. {keyboards applicable also to other musical instruments Subclasses 1+ and 50+} subclasses 316+ takes precedence} {G10H 1/34}


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984 /   HD   MUSICAL INSTRUMENTS

300  DD  ELECTRONIC MUSICAL INSTRUMENTS {structural combinations of microphones, pick-ups, or amplifiers with musical instruments subclasses 1+, 50+, and 100+; Instruments in which each note is generated by a different individually-actuated mechanical resonating structure and is amplified electrically subclasses 50+; Instruments in which each note is produced by a different electrically-vibrated sounding element subclasses 100+; Electronic circuits in general H03. {G10H} {4}
301  DD  .~ Details of electrophonic musical instruments {keyboards applicable also to other musical instruments subclasses 1+ and 50+} {G10H 1/00} {9}
344  DD  .~.~ Constructional details {G10H 1/32} {1}
345.~.~.~ Switch arrangements, e.g., keyboards or mechanical swicthes peculiar to electrophonic musical instruments, etc. {keyboards applicable also to other musical instruments Subclasses 1+ and 50+} subclasses 316+ takes precedence} {G10H 1/34} {1}
346  DD  .~.~.~.~> For guitar-like instruments with or without strings and with a neck on which switches or string-fret contacts are used to detect the notes being played {electric guitars in which the tones are generated by the vibration of strings subclasses 368+} {G10H 1/34B}