ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,557,939, issued on Feb. 24, was assigned to Tianjin Yunda Industry and Trade Co. Ltd. (Jinghai, China).
"Coffee machine filter cartridges" was invented by Enyu Wei (Tianjin, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "Exemplary embodiments of a filter cartridge for a coffee machine are disclosed. According to one exemplary embodiment, a coffee machine filter cartridge may include a filter body having a water inlet, a grate and a water outlet, and a lid held on the filter body. The water inlet is disposed around the water outlet. The water outlet connects to one end of the grate through a pipe. The other end of the grate is held on the inner wal...