(under subclass 419) Subject matter including two or more opaque mirror-like means which redirect the incident radiation back to the medium from which it came.
SEE OR SEARCH CLASS
219, Electric Heating,
405, for heat energy reflecting or directing means and subclass 411 for infrared generating means.
359, Optics: Systems (Including Communication) and Elements,
850+, for plural mirrors.
362, Illumination,
297+, for plural reflecting surface and subclasses 346+ for plural separate reflectors or separate section.
