Trademark Clearing House Up To 27,252 Marks Posted on March 11, 2014 Share on Social MediaxfacebookFollow us on Social Mediaxfacebook The Trademark Clearing House (TMCH) issued its monthly update. As of March 10th 2014, there are 27,252 marks submitted for a total of 59, 593 trademark years. 20, 076 notifications were sent to holders based off attempted new gTLD registrations.