US Patent 8757156 Face mask with unidirectional multi-flap valve

Patent 8757156 was granted and assigned to 3M on June, 2014 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

87571560

Patent Inventor Names

Michael K. Domroese0

Philip G. Martin0

Date of Patent

June 24, 2014

Patent Application Number

122500590

Date Filed

October 13, 2008

Patent Citations Received

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US Patent 11903430 Protective face mask

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US Patent 12128186 Patient interface valve arrangment

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US Patent D1039682 Face mask

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US Patent 11700893 Protective face mask

Patent Primary Examiner

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Justine Yu

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