Respirator Negative Pressure Fit Check Devices and Methods
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2024-10-29
ALEXANDRIA, Virginia, Oct. 29 -- 3M INNOVATIVE PROPERTIES COMPANY, St. Paul, Minnesota has been assigned a patent (No. US 12128259 B2, initially filed June 4, 2021) developed by twelve inventors William A. Mittelstadt, Woodbury, Minnesota; Carl W. Raines, III, Woodbury, Minnesota; David R. Stein, White Bear Lake, Minnesota; Nathan A. Abel, Minneapolis, Minnesota; David M. Blomberg, Lino Lakes, Minnesota; Michael J. Cowell, Woodbury, Minnesota; Gary E. Dwyer, Mallorytown, Canada; Thomas I. Insley . . .