(under subclass 870.01) Subject matter in which the intelligence is transmitted from the transmitter to the
receiver by radiant energy.
(1) Note. The radiant energy means, for example, may be an infrared means.
SEE OR SEARCH CLASS
250, Radiant Energy,
200+, for photocell systems; and subclasses 338 for infrared and other radiant energy systems.
359, Optics: Systems (Including Communication) and Elements,
109+, for light ray communication systems such as subclasses 113+ for duplex optical communication and subclasses 115+ for multiplex optical communication. 455, Telecommunications,
41, for induction or near field systems limited of radio telephony.
