Cartridge filter

Centrifugal oil filter

Centrifugal oil filter with particle retention

Centrifugal oil purifying means

Centrifugal separator

Centrifugal spin-on filter or separator and method of making and

Ceramic filter filtration apparatus for purifying swimming pool

Chemical dispenser for bodies of water

Chip filtration and removal system

Chlorinator for a swimming pool

Chlorinator for a swimming pool

Chlorinator for swimming pools

Chlorine dispenser

Cistern for natural purification and plankton cultivation

Classifying device for aggregates immersed in a fluid

Cleaner for aquarium

Cleaning implement for swimming pools

Cleaning of a body of liquid

Cleaning system for use in treatment of excess paint

Cleaning unit for collecting debris in a swimming pool