Patents/Inventors

Dean R. Duffy

Woodbury, MNUS2 patents

3 Patents

US124340802025
Foldable Face-piece Respirator with Exhalation Valve
3M Innovative Properties Company
0 cites
US123703862025
Flat-fold Respirator Having Flanges Disposed on the Mask Body
3M Innovative Properties Company
0 cites
US121505022024
Respirator Including Transversely-extending Pleat and Method of Forming Same
3M Innovative Properties Company
0 cites