US PATENT SUBCLASS 178 / 33 A
.~.~.~ Double selectors

Current as of: June, 1999
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178 /   HD   TELEGRAPHY

2 R  DF  SYSTEMS {21}
23 R  DF  .~ Printing {8}
33 R  DF  .~.~ Selectors {3}
33 A.~.~.~ Double selectors

Unofficial Alpha Subclasses: R MP A

DEFINITION

Classification: 178/33

(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,

355+, for telephone call transmitters.