US Patent D811580 Unidirectional valve for face mask
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Patent Inventor Names
Ee Ho Tang0
Kwok Jiang Sak0
Wei Liang Jerome Lee0
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US Patent D0811580 Unidirectional valve for face mask US Patent D811580 Unidirectional valve for face mask
Infobox
Patent Number
D08115800
Patent Number
D8115800
Edits on 5 Oct, 2022
Golden AI
Infobox
Is a
Patent Jurisdiction
Patent Number
D08115800
Date of Patent
February 27, 2018
0Patent Application Number
295083960
Date Filed
November 5, 2014
0Patent Primary Examiner
Edits on 19 Jan, 2022
Golden AI
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US Patent D0811580 Unidirectional valve for face mask
Infobox
Is a
Patent jurisdiction
Patent number
D0811580
Date of patent
February 27, 2018
Patent application number
29508396
Date Filed
November 5, 2014
Patent primary examiner
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