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The ornamental design for a protective face mask, as shown and described.
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1. Protective face mask
Patent | Priority | Assignee | Title |
D946832, | Dec 03 2020 | Foldable mask | |
D951551, | Mar 31 2020 | Massachusetts Institute of Technology | Face shield |
ER1890, | |||
ER8123, |
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D906597, | May 14 2020 | Mask with tabs and snap |
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