This may be the pulp connection to the Polyurethane filter. Filtering face-piece respirator having a face seal comprising a water-vapor-breathable layer Patent Assignee 3M INNOVATIVE PROPERTIES COMPANY (St. Paul, MN,…
This may be the pulp connection to the Polyurethane filter. Filtering face-piece respirator having a face seal comprising a water-vapor-breathable layer Patent Assignee 3M INNOVATIVE PROPERTIES COMPANY (St. Paul, MN,…
This may be the pulp connection to the Polyurethane filter. Filtering face-piece respirator having a face seal comprising a water-vapor-breathable layer Patent Assignee 3M INNOVATIVE PROPERTIES COMPANY (St. Paul, MN,…