U.S. federal trademark · Serial No. 73458492 · Reg. No. 1316814
Anti-Tension Assistance Device Consisting of a Dual Earphone Assembly and a Headband, the Headband Having Electronic Means for Sensing Activity Level in the Frontalis Muscles and for Generating a Tone Proportional to the Activity Level which Tone Is Communicated to the Wearer of the Headband of the Device Through the Earphones
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