(under the class definition) Subject matter wherein the subject matter of this class is combined with the subject matter of another class where not elsewhere provided.
(1) Note. Included is convertible subject matter involving subject matter of another class not provided for elsewhere which converts an optical test apparatus to a test apparatus of another test class or to another art device.
(2) Note. Where the subject matter of another class prepares the substance tested for an optical test of this class, see subclass 36.
SEE OR SEARCH THIS CLASS, SUBCLASS:
68, for structures to convert regular lamps to egg candlers.
