(under subclass 29) Systems in which the signals or automatic-stop devices are actuated or controlled by the methods of so-called "wireless telegraphy", making use of Hertzian waves.
SEE OR SEARCH CLASS
340, Communications: Electrical,
825.69, and 825.72 for radio-wave systems for controlling a device.
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation), appropriate subclasses for miscellaneous radio-signaling and teledynamic systems, particularly
61+, for the miscellaneous systems for controlling a device by means of reflected or otherwise returned radio wave energy; See the classes under "SEARCH CLASS" in the class definitions of Class 343 for the other classes which provide for radiant-energy systems for controlling a device.
