For what it's worth, here is an excerpt from the Bluetooth SIG agreement that you probably accepted when signing up on their site:
"BLUETOOTH TRADEMARK LICENSE AGREEMENT
This Bluetooth Trademark License Agreement (the “License”) is made as of the date of acceptance by you as a member of Bluetooth SIG, Inc., a Delaware corporation (“Bluetooth SIG”), as evidenced by you entering into the Bluetooth SIG Membership Agreement by clicking the “I Accept” button at the bottom of the Bluetooth SIG Membership Application and Commitment Agreement.
Effective upon such date, Bluetooth SIG, having ownership of the Bluetooth Trademarks (as defined below) hereby grants you the following rights related to such Bluetooth Trademarks in consideration for your acceptance of the terms and conditions of the Bluetooth SIG Membership Agreement."
....
"2 LICENSE GRANT. 2.1 Scope. Subject to the Member complying with the terms and conditions of the Membership Agreement, this License and the Instructions, Bluetooth SIG hereby grants Member a worldwide, royalty-free, non-exclusive, nontransferable (with no right to sublicense), personal right to use the Bluetooth Trademark(s) in relation to production, manufacture, supply, promotion, marketing, sale, lease or other distribution and advertisement of Bluetooth Services and/or Bluetooth Products that include Compliant Portions (the “Trademark License”)."