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Creation date / 2020 / January
- Rockford, Illinois manufacturing history.
- INGERSOLL MIILLING MACHINE COMPANY HISTORY.
- Patent number 2,474,140. Page 1.
- Patent number 2,474,140. Sheet 4.
- Rockford, Illinois history.
- Patent number 2,474,140.
- Patent number 2,474,140. Sheet 3.
- Patent number 2,474,140. Sheet 2
- Patent number 2,474,140. Page 2.
- The Foote Burt Drilling Machine Company
- Patent number 2,474,140. Page 4.
- Patent number 2,474,140. Page 3.
- An original blue print drawing of the beer pasteurizer machine still in the Stevens Point Brewery.
- INGERSOLL MILLING AND MANUFACTURING COMPANY HISTORY.
- Picture credit courtesy of John Harry and the Arcadia Publishing Company.