(under subclass 180) Subject matter which further includes one or more transparent elongated structures (e.g., rods, fibers, or pipes) which are used to transmit light waves from one point to another within the confines of their outer surface by means of internal reflections or modal transmission.
(1) Note. This requires total internal reflection.
(2) Note. This subject matter includes an optical waveguide in combination with an optical transmitter (see Search Notes for Class 385).
SEE OR SEARCH CLASS
250, Radiant Energy,
227.11+, for photocell control that could be optical communication type modulator.
324, Electricity: Measuring and Testing,
95, for measuring, testing, or sensing electricity with waveguide or long line. 385, Optical Waveguides, appropriate subclasses for optical waveguide structure, per se.
