What is your favorite invention or discovery that was made by someone on August 11th?

Today's theme is History and Innovation.
In 1909, Harvey Hubbell patented electric light bulb socket with a pull chain.
What is your favorite invention or discovery that was made by someone on August 11th? How has it impacted your life or the world?
Thank you for watching my video on history and innovation. I hope you enjoyed learning about the electric light bulb socket with a pull chain, which was patented by Harvey Hubbell on August 11, 1909. This invention made it easier and safer to turn on and off electric lights, and it is still widely used today.
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Thanks for watching!
Cheers,
Geoff
geoffmobile.com