Filter apparatus and method of operating same

Filter apparatus for air or gas purification

Filter arrangement inserted in the intake airflow of a heating o

Filter bag construction for a vacuum cleaner and method of opera

Filter bag preparation

Filter bag tensioning device and method

Filter cleaning apparatus and method

Filter comprising a material obtained by freeze-drying, method o

Filter construction

Filter element and assembly

Filter element for use in bagging asbestos during an asbestos re

Filter element with a drainage tube

Filter element, filter, and method for removing odors from indoo

Filter for cleaning gases

Filter for gas filtration

Filter for liquids capable of containing a gas

Filter for removing cancer causing compounds from exhaust fumes

Filter for removing smoke and toner dust in electrophotographic/

Filter made of electrostatically spun fibres

Filter module