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J. I. Case may refer to:
- Case Corporation -- the tractor manufacturer formerly known as the J. I. Case Company
- Jerome Case (1819-1891) -- Jerome Increase Case, farm machinery maker and racehorse owner; founder of J. I. Case Company
- Jackson Irving Case (1865-1903) -- son of Jerome Case
- Jerome I. Case High School -- a Wisconsin high school also known as "J.I. Case" or "Racine Case"
Source of article : Wikipedia