28993 ⎘
Cartridge filters of the throw-away type having more than one filtering element connected in series
Sub-classes:MULTI-LAYER POROUS POLYMERIC MEMBRANE AND RELATED FILTERS AND METHODS
#2FILTRATION TESTING DEVICES
#3FILTER APPARATUS
#4FILTER MEDIA, FILTER CARTRIDGE CONTAINING FILTER MEDIA, AND METHOD OF FILTERING WATER
#5Water treatment dispensing apparatus
#6Fuel system having pumping and filtration fuel module and flow housing for same
#7WATER FILTER
#8Fuel system having pumping and filtration fuel module and flow housing for same
#9Bypass and full flow combination filter
#10Disposable filter unit for a system allowing for purification and recycling of water or separation of water
#11WATER PURIFIER
#12BATH SHOWER WITH DISPOSABLE FILTRATION UNIT
#13Multi-stage filter assembly
#14Bypass filter method and device
#15Serial flow channel type filter cartridge
#16WATER PURIFICATION CARTRIDGE AND WATER PURIFIER
#17Refrigerator
#18Water separation filter
#19COUNTERTOP FLUID DISPENSER
#20Multistage filter
#21Water purification and enhancement systems
#22Refrigerator water filter assembly
#23Filter device
#24Liquid filter, especially an oil filter for an internal combustion engine
#25Multi-stage filter assembly