ALEXANDRIA, Va., July 15 -- United States Patent no. 12,663,343, issued on June 23, was assigned to Camfil AB (Stockholm).
"Scanning device for an air filter" was invented by Lim Boon Han (Ipoh Perak, Malaysia), Xin Chen (Shanghai), Keith Woolard (Washington, N.C.), Kwang Chueng Lee (Singapore) and Aaron Warner (Washington, N.C.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A scanning device for an air filter being arranged to be mounted in a circular duct, comprising: a driving unit and a sampling unit, wherein the driving unit comprises an inner magnetic member and an inner magnetic member support element and an outer magnetic member and a circular guiding rail wherein the sampling unit comprises a centra...