Well, those products didn’t exist when they made eink displays. The whole point of a patent is to grant a temporary monopoly in exchange for the patent holder making details of the invention public. The patent holder gets a monopoly on producing and selling that thing so they can recoup their investment, and competitors can make derivatives after the patent period.

If a product already exists, you can’t patent it because it falls under the “prior art” restriction.

That said, I absolutely agree that patents should have a much shorter duration. I think the right number is somewhere in the 5-7 year range, but others certainly have different opinions. What I’d like is an actual, national discussion about it instead of just random ranting on social media.