| http://www.w3.org/ns/prov#value | - The stock material of the invention has utility as a fluid filter for drain openings and the like, to prevent debris from entering of clogging the drain opening, in a wide variety of particular applications, including, without limitation, outdoor drains and waste pipes in yards and pavements, roof drains or downspouts, floor drains, drains for chemical or other industrial plant tanks, and swimming
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