ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,670, issued on Aug. 19, was assigned to Moldex-Metric Inc. (Culver City, Calif.).
"Dual mode respirator" was invented by Mark Magidson (Los Angeles) and Sukwon Kang (Torrance, Calif.).
According to the abstract* released by the U.S. Patent & Trademark Office: "In some examples, a dual mode respirator comprises a face piece; an inhalation port; an exhalation port; and a port closure movable to close the exhalation port and switch the dual mode respirator from a source control mode to a free exhalation mode of the dual mode respirator."
The patent was filed on Jan. 28, 2022, under Application No. 17/649,243.
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