ALEXANDRIA, Va., June 2 -- United States Patent no. 12,644,299, issued on June 2.
"Swimming pool backwash filtration device" was invented by Alexander Tothfalusi (Mount Brydges, Canada).
According to the abstract* released by the U.S. Patent & Trademark Office: "A pool backwash secondary filtration assembly for filtering water from a pool for reuse includes a housing, which is cylindrical and which has a first end that is open. A tubular filter is positionable within the housing and an endcap is selectively attachable to the housing to close the first end. A biaser attached to the endcap biases a plug into the tubular filter upon attachment of the endcap to the housing and the tubular filter is sealingly engaged to a second end of the hou...