Try the free search tool at familysearch.org. There are several listings for John Banta in MN census data from 1900- 1930. Maybe you can find the correct one - as they have different dates and locations of birth.
Click this link to see that list. Click on any name to see the detail of the documents.
https://familysearch.org/search/records/index#count=20&query=%2Bgivenname%3A%22john%20f%22~%20%2Bsurname%3Abanta~%20%2Bresidence_place%3AMN~%20%2Bresidence_year%3A1900-1930~
