The Reddit date for that article is March 2021 but the patent date is from Sept 2019.
I think I’ll save it for later.
Navy patent was filed in 2019, but published in March 2021
https://patents.justia.com/patent/20210090752#history
Patent History
Publication number: 20210090752
Type: Application
Filed: Sep 24, 2019
Publication Date: Mar 25, 2021
Applicant: United States of America, as represented by the Secretary of the Navy (Arlington, VA)
Inventors: Pearl Rayms-Keller (Fredericksburg, VA), Michael S. Lowry (Fredericksburg, VA), Stacy R. Barker (King George, VA)
Application Number: 16/579,930
https://www.upcounsel.com/patent-granted-vs-published