Nominative Fair Use
The nominative fair use doctrine allows others to use a trademark of another to describe the product or to compare it to their own product. If there is no other way to describe the product or service except to use the trademark, then the use is probably allowable. However, the use can't use logos, distinctive fonts, or symbols. Using any more than the minimum amount of the trademark needed to identify the product is not allowed. The use of the trademark must also not imply that the trademark holder endorses or sponsors the use.