Number | Name | Date | Kind |
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D140814 | Eddy | Apr 1945 | S |
D309962 | Ebeling | Aug 1990 | S |
D908205 | Hwang | Jan 2021 | S |
11129424 | Nishida | Sep 2021 | B2 |
11206880 | Naos | Dec 2021 | B1 |
20060174890 | Cheng | Aug 2006 | A1 |
20150173436 | Tsuei | Jun 2015 | A1 |
20150216241 | Lee | Aug 2015 | A1 |
20160029716 | Duncan | Feb 2016 | A1 |
20200121005 | Belousov | Apr 2020 | A1 |
20200397087 | Crenshaw | Dec 2020 | A1 |
20210368874 | Eldibany | Dec 2021 | A1 |
20210392966 | Nguyen | Dec 2021 | A1 |
20220016298 | Harder | Jan 2022 | A1 |
Number | Date | Country |
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2969700 | Jan 2018 | CA |
306789109 | Aug 2021 | CN |
008006274-0001 | Jun 2020 | EM |
3922119 | Dec 2021 | EP |
6097665 | Aug 2020 | GB |
20210002823 | Dec 2021 | KR |
Entry |
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NPR Demand Surges (available [online] Jul. 28, 2020) Retrieved from the internet Feb. 3, 2022 from URL: https://www.npr.org/sections/health-shots/2020/07/28/893071631/demand-surges-for-see-through-face-masks-as-pandemic-swells (Year: 2020). |
No Brand (available [online]) Retrieved from the internet Feb. 10, 2022 from URL: https://www.mscdirect.com/product/details/14868889 (Year: 2022). |
DELUXEMASK (available [online]) Retrieved from the internet Feb. 3, 2022 from URL: https://www.etsy.com/listing/970478940/transparent-clear-window-mask-anti-fog (Year: 2022). |
ClearMask (available [online]) Retrieved from the internet Feb. 10, 2022 from URL: https://buy.theclearmask.com/products/clearmask-case-medical?variant=39589672386629 (Year: 2022). |