Electrical Musical Tone Generation Patents (Class 84/600)
- Variable frequency (Class 84/672)
- With frequency multiplication or division (Class 84/675)
- Selecting circuits (Class 84/678)
- Noise reduction (e.g., error prevention, etc.) (Class 84/691)
- Tone synthesis or timbre control (Class 84/692)
- Expression or special effects (Class 84/701)
- Accompaniment (Class 84/712)
- Constructional details (Class 84/718)
- Fret control (Class 84/722)
- Photoelectric (Class 84/724)
- Electromagnetic (Class 84/725)
- Piezoelectric (Class 84/730)
- Capacitive (Class 84/733)
- Strain gauge (Class 84/734)
- Tone synthesis or timbre control (Class 84/735)
- Expression or special effects (Class 84/737)
- Selecting circuits (Class 84/742)
- Constructional details (Class 84/743)