# Hyundai Motor — Patents explained on PatentBrief

Hyundai Motor has 3 landmark patents explained in plain English on PatentBrief.

- [How to Prepare a Fuel Cell for Faster, Cheaper Startup](https://patentbrief.org/patent/us/20140045086/pre-activation-method-for-fuel-cell-stack)
  This patent describes a method for 'pre-activating' a fuel cell stack by injecting humidified hydrogen, sealing it, and storing it, which helps reduce the time and hydrogen needed for its first full operation.
- [How a Fuel Cell Humidifier Safely Mixes Exhaust Gases](https://patentbrief.org/patent/us/20200266464/humidifier-for-fuel-cell-20200266464)
  Hyundai's patent describes a fuel cell humidifier that not only adds moisture to incoming air but also intelligently mixes exhaust gases, including hydrogen, with fresh air using a special valve to make the exhaust safer before it leaves the system.
- [How a Fuel Cell Humidifier Controls Air Moisture with a Smart Valve](https://patentbrief.org/patent/us/10950878/humidifier-for-a-fuel-cell) — granted 2021
  This patent describes a fuel cell humidifier that uses two humidifying spaces and a controllable valve to precisely adjust the moisture content of incoming air before it reaches the fuel cell stack, improving efficiency and durability.

**Full profile:** https://patentbrief.org/company/hyundai-motor

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