4. Stock material or miscellaneous articles
  5. Structurally defined web or sheet
  6. Discontinuous or differential coating, impregnation or bond

Harvey J. Berg

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Methods of forming fibrous filtration face masks

Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent

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Molded fibrous filtration products

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent

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Resilient shape-retaining fibrous filtration face mask

Surgery – Respiratory method or device – Means for removing substance from respiratory gas
Patent

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Profile ID: LFUS-PAI-P-790498

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