Just saw this:
Abandonment Notice! On Friday, October 12, 2012, a U.S. federal trademark for ZeniMax Media Inc. registration number 78408878 was abandoned having the name SHADOWKEY. The Reason provided as CANCELLED - SECTION 8.

http://www.trademarkia.com/trademark-by-company-details.aspx?cnam=zenimax-media-inc&id=1374559&page=1&tid=2