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jgcc
searching PlanetScale…
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by
jgcc
7y ago
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, US) http://
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by
jgcc
7y ago
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, US) http://