U.S. federal trademark · Serial No. 98758184
Portable and or wearable radio frequency (RF) transmitters and or receivers. These units are sealed and waterproof, have a wide temperature operating range and a multi-year battery life. The units sends out frequent, periodic, uniquely identified RF signals. Location and tracking may be done from the air.
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.