# John G. Elias — Patents explained on PatentBrief

John G. Elias has 2 landmark patents explained in plain English on PatentBrief.

- [How Touchscreens Use Math to Recognize Your Fingers](https://patentbrief.org/patent/us/7812828/ellipse-fitting-for-multi-touch-surfaces) — granted 2010
  Apple's patent on using mathematical ellipses to track and identify individual fingers and palms on a touch-sensitive surface.
- [How a Multi-Touch Screen Detects Multiple Fingers and Palms](https://patentbrief.org/patent/us/6323846/aqua-user-interface) — granted 2001
  This patent describes the underlying electronic circuits and methods for a multi-touch surface that can track multiple fingers and palms simultaneously, even before they fully touch the screen.

**Full profile:** https://patentbrief.org/inventor/john-g-elias

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_Source: PatentBrief — https://patentbrief.org. Plain-English explanations of US patents._