ALEXANDRIA, Va., Dec. 23 -- United States Patent no. 12,502,634, issued on Dec. 23, was assigned to NGK INSULATORS Ltd. (Nagoya, Japan).
"Honeycomb filter" was invented by Tadato Ito (Komaki, Japan) and Sho Inotsume (Miyoshi, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A honeycomb filter comprising a pillar-shaped honeycomb structure having a porous partition wall disposed so as to surround a plurality of cells which serve as a fluid through channel extending from an inflow end face to an outflow end face and a porous plugging portion provided at either an end on the inflow end face side or an end on the outflow end face side of the cell, wherein in a processed image obtained by binarizing an electr...