1949–1990
From the 1989 Big Ten basketball media guide.
1990–2011
If you look closely, you can see the number "11"
2011–present
During 2010 it was announced that Big Ten would expand from eleven to twelve teams. This made the need for a new logo apparent. However, the new logo reflects the number "10", rather than the number "11".
The new logo was finally revealed on December 13, 2010. It will be launched with the 2011-2012 academic year. The new logo was created by Pentagram.
A secondary logo, with the full name.
Big Ten Conference
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| East Division: Indiana | Maryland | Michigan | Michigan State | Ohio State | Penn State | Rutgers West Division: Associate members: Big Ten Network (49%)  |
