Hi, we not allowed to used TM symbol as it's a rules here. :
Use of the ® symbol prior to registering your new logo may be considered illegal by your local government agency. Many of our clients are from the US - the United States body that governs such registrations explains clearly when and how you can use ®, TM and SM marks.
As an example for LogoTournament.com's many US clients, please see:
http://www.uspto.gov/faq/trademarks.jsp#_Toc275426682Considering the real possibility for clients to be adversely affected, LogoTournament.com admin staff or moderators will remove any entries that specifically contain the ® mark to avoid any potential problems for all parties to the contest.
We ask that you avoid this concern by not following Client requests to include ® marks in your entries and direct them to this FAQ.
We appreciate your understanding.