(under the class definition) Subject matter wherein a magnetic field pattern in pictorial or s:graphic form is recorded on a magnetic medium for visible display, as by development, by toning, or other techniques.
SEE OR SEARCH CLASS
358, Facsimile,
296, for the subject matter of this subclass in combination with a facsimile.
360, Dynamic Magnetic Information Storage or Retrieval, appropriate subclass for magnetic recording not intended to be rendered directly visible.
361, Electricity: Electrical Systems and Devices,
193+, for magnetizing or controlling magnetic fields.
399, Electrophotography, 9+, for diagnostics, subclasses 38+ for controls, subclasses 130+ for image formation, subclasses 168+ for charging, subclasses 177+ for exposure, subclasses 222+ for development, subclasses 297+ for transfer, subclasses 320+ for fixing, subclasses 343+ for cleaning, and subclasses 361+ for document handling.
