# California Institute of Technology — Patents explained on PatentBrief

California Institute of Technology has 3 landmark patents explained in plain English on PatentBrief.

- [How Wearable Tech Uses 3D Sound to Guide Visually Impaired People](https://patentbrief.org/patent/us/10362429/find-my-network) — granted 2019
  A system that builds a 3D map of the world and uses spatial audio to act as a virtual guide, helping visually impaired users navigate around obstacles.
- [How a Modern Camera Sensor Captures Light and Converts It to Data](https://patentbrief.org/patent/us/5471515/cmos-active-pixel-image-sensor) — granted 1995
  This patent describes a camera sensor technology that combines light-capturing elements with a special circuit to read out the image data quickly and efficiently, all on a single chip.
- [How Hopfield Networks Use Resistors to Mimic Brain-Like Memory](https://patentbrief.org/patent/us/4660166/electronic-network-for-collective-decision-based-on-large-number-of-connections-between-signals) — granted 1987
  A foundational patent describing an electronic circuit that uses a grid of resistors to perform computations, effectively creating an artificial neural network that can store and recall patterns.

**Full profile:** https://patentbrief.org/company/california-institute-of-technology

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