US Patent D973196 Respiratory mask
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Patent Inventor Names
Pengfei Zhu0
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US Patent D0973196 Respiratory mask US Patent D973196 Respiratory mask
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Patent Number
D09731960
Patent Number
D9731960
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Patent Citations
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US Patent D0973196 Respiratory mask
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Patent Jurisdiction
Patent Number
D09731960
Date of Patent
December 20, 2022
0Patent Application Number
297455820
Date Filed
August 6, 2020
0Patent Citations
Patent Primary Examiner
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