Yes. All trademarks can be sold or assigned. The "goodwill" of any business associated with that trademark must be included in any such transfer. Even trademarks that are unregistered or are the subject of pending applications can be sold or assigned. Written assignments of registered trademarks are recommended, and may be recorded with the USPTO for a fee. The USPTO's Assignments page is www.uspto.gov/ebc/help_assignments_p.htm
. Specific inquiries should be referred to the Assignment Division at (571) 272-3350.