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    Early firemen first managed their breathing by dipping their beards in water and then holding it between their teeth.

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Alfonso Alvarez patented his Dual-Vent Window

On the 2nd February, 1965, Alfonso Alvarez received a patent for his Dual-Vent Window.

You might be interested to know:
  • On 7th February, 1995, Gunter and Williams patented a Personalized Interactive Storybook... Read more »
  • On 8th March, 1994, The wheeled suitcase with a collapsible handle was patented... Read more »
  • On 17th August, 1993, The Platform Steerable Skateboard was patented... Read more »
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