Inventor
XUE JIANXIAN
US4 patents
Patents
4 patentsUS7188622B2Mar 13, 2007
Filtering face mask that has a resilient seal surface in its exhalation valve
3M INNOVATIVE PROPERTIES CO124 citations96
US7028689B2Apr 18, 2006
Filtering face mask that uses an exhalation valve that has a multi-layered flexible flap
3M INNOVATIVE PROPERTIES CO91 citations96
US7013895B2Mar 21, 2006
Exhalation and inhalation valves that have a multi-layered flexible flap
3M INNOVATIVE PROPERTIES CO89 citations96
US6332465B1Dec 25, 2001
Face masks having an elastic and polyolefin thermoplastic band attached thereto by heat and pressure
3M INNOVATIVE PROPERTIES CO167 citations93