The first Sears retail store opened in Chicago.
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The sweeping machine (vacuum cleaner) was patented in Chicago, US, by Ives W. McGaffey.
An F5 max rating tornado smashed through Plainfield, Illinois, killing 29 people, injuring 353, and causing $165 million in damages.
The first Dairy Queen restaurant opened in Joliet, Illinois, US.
Paul Galvin and his brother Joseph founded Motorola as the 'Galvin Manufacturing Co.' in Chicago, Illinois.
The first private research atomic reactor opened in Chicago, Illinois, US.
