US Patent Issued to 3M Innovative Properties on Jan. 13 for "Seal evaluation systems and methods for respiratory protection devices" (Minnesota, Wisconsin Inventors)

ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,521,582, issued on Jan. 13, was assigned to 3M Innovative Properties Co. (St. Paul, Minn.).

"Seal evaluation systems and methods for respiratory protection devices" was invented by Wei Zhao (Wooodbury, Minn.), Wenbo Dong (Lakeville, Minn.), Yutao Gong (Woodbury, Minn.), Xuan Wang (Woodbury, Minn.) and Francis T. Caruso (Hudson, Wis.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A fit detection system for a respiratory protection device is presented that includes an infrared camera that captures an image sequence of a user wearing the respiratory protection device. The system also includes a temperature change detector that analyzes images in the image ...