ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,756, issued on Aug. 19, was assigned to NGK INSULATORS Ltd. (Nagoya, Japan).

"Honeycomb filter" was invented by Fumihiko Yoshioka (Nagoya, Japan) and Sachiko Ishida (Nagoya, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A honeycomb filter includes a honeycomb structure having a porous partition wall disposed to surround a plurality of cells; and a plugging portion provided at one end of the cell, wherein the honeycomb structure has an inflow side region including a range of up to at least 30% with respect to the total length of the honeycomb structure with the inflow end face as the starting point and an outflow side region including a range ...