Since I do have sleep apnea, and have been on CPAP for > 12 yrs, I have more that just an investment interest. If the device is patented, why not show it?
Also it seems David Singh's company merged with VivosLife and found this website at https://www.dnaappliance.com/ which appears to talk about the same device and maybe is the old company's website. Not sure, it is a little confusing.