US PATENT SUBCLASS 178 / 62
.~ Chemical
Current as of: June, 1999
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DEFINITION
Classification: 178/62
(under subclass 2) Systems in which the message transmitted by current impulses or variations is recorded by the chemical or electrolytic action resulting therefrom; also recorders for recording code messages on chemically or specially prepared surfaces through the chemical change or electrolytic action produced by the impulses or current transmitted.
SEE OR SEARCH THIS CLASS, SUBCLASS:
3+, for chemical systems having automatic transmitters,
particularly subclass 11 for formation or production of records by successive-line apparatus.
89, and appropriate indented subclasses for features common to code-recorders.
111, for chemically prepared tapes.
SEE OR SEARCH CLASS 205, Electrolysis: Processes, Compositions Used Therein, and Methods of Preparing the Compositions,
52+, for electrolytic processes of recording messages. The systems or other apparatus specialized for carrying out such processes are to be found in this class (178), subclass 62.
