(under subclass 601) Subject matter including optical and electrical means for storing data representative of the musical tones.
SEE OR SEARCH CLASS
250, Radiant Energy,
200+, for photocell systems.
361, Electricity: Electrical Systems and Devices,
173+, for the activation of solenoids from a condition responsive photosensor.
362, Illumination,
295, for a switch which acts in response to a light source or modifier which ultimately controls, for example, an oscillator; subclass 802 for light activated switches, per se. 365, Static Information Storage and Retrieval,
