(under subclass 23) Teles:graphic printing systems having means for selectively operating one or more of a plurality of printing surfaces by the character of the signal impulses or current transmitted, but excluding sun-flower and step-by-step wheels without auxiliary selectors.
SEE OR SEARCH CLASS
340, Communications: Electrical,
825+, for nontelegraph selective systems, analogous to the selective systems utilized in telegraphy but restricted to the communication of a limited amount of information or control.
381, Electrical Audio Signal Processing Systems and Devices,