Comment Comment by pjc50 The patent: https://patents.google.com/patent/US10517484B2/enNote how similar this is to the pulse oximeter, which was invented in Japan in 1972 and patented in the US in 2004.https://www.nihonkohden.com/technology/aoyagi.htmlhttps://patents.google.com/patent/US20050049469A1/en parent pjc50 1 year ago
Note how similar this is to the pulse oximeter, which was invented in Japan in 1972 and patented in the US in 2004.
https://www.nihonkohden.com/technology/aoyagi.html
https://patents.google.com/patent/US20050049469A1/en