The Linux Mint Subpixel font enhancement screen.
As a side note, anything obvious to someone versed in the art shouldn't be patentable.
Software shouldn't be patentable. The USPTO gets more money from an approval than rejection. Checking for prior art costs money. The scheme is that anyone objecting should take the patent holder to court and get the patent declared invalid. You can imagine how well that works with large American Corporations.
Cleartype only works with dot addressable flat panel displays of high enough resolution so you don't see the fringing, black text on white, or possibly white on black and known layout. It's obvious to anyone versed in the art.
As an aside, my screen is about 160 dpi. The DPI setting on that panel sets the font size and spacing of elements. I always set it LOWER than the screen. I put it at about 66 on screens only 600 pixels high to fit enough text / windows etc and 72 on 768 high screens. My screen is 1920 wide 1080 high, a step back from my 2002 laptop for PDFs, which was 1600 x 1200.
I watch video on a big screen, 42" or 48". Never the laptop. Idiot PC makers.