# Christopher Patrick FOSS — Patents explained on PatentBrief

Christopher Patrick FOSS has 2 landmark patents explained in plain English on PatentBrief.

- [How Apple's Interface Switches Between Music Playlists and Menus](https://patentbrief.org/patent/us/10928980/ios-widgets-on-home-screen) — granted 2021
  A method for navigating through a stack of music playlists on a touchscreen or dial, which automatically shifts to a menu view when you reach the end of the list.
- [How the Apple Watch Uses the Digital Crown to Flip Objects](https://patentbrief.org/patent/us/10275117/apple-watch-heart-rate-sensor) — granted 2019
  A method for rotating virtual objects on a small wearable screen by spinning the physical dial on the side of the device based on how fast you turn it.

**Full profile:** https://patentbrief.org/inventor/christopher-patrick-foss

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