BIOELEMENTS

Class [11]
Environmental Control Instrument Products lighting heating cooling cooking

Installations and apparatus all for the treatment and purification of water, waste water, and sewage, all involving the use of submergeable filter elements, the use of multi-faced filter elements, and/or the use of filter elements presenting a plurality of radially directed surfaces projecting from a central core all for providing support for a filtering media, such media being arranged as a submerged bed of a plurality of packages of such media and all included in Class 11.