(under subclass 200) Subject matter having a photocell means which detects a light emitting source wherein the source is composed of a semiconductor material.
(1) Note. In order to be classified in this subclass, the solid state light source must be recited other than by name only.
SEE OR SEARCH THIS CLASS, SUBCLASS:
211, for a photocell which is composed of a semiconductor material and which controls an electrical or electromechanical system.
SEE OR SEARCH CLASS
257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes), 80, 85 for semiconductor light emitting sources combined with semiconductor light responsive devices.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,
514+, for nonlinear solid-state circuit or system which depends upon an external light source.
331, Oscillators,
43+, for oscillators of the molecular or particle resonant type; e.g., maser type. The combination may include a photocell.
359, Optics: Systems (Including Communication) and Elements,
109+, for light wave communication and subclasses 333+ for means for applying an electric signal to an amplifying device which is an optical laser and means for securing an amplified output therefrom where the combination may include a photocell.
362, Illumination,
276, and 277+ for illuminating means having a movable screen which is automatically controlled by a photocell wherein said illumination means may be solid statelight emitting source.
372, Coherent Light Generators, appropriate subclasses for laser type oscillators.
