U.S. federal trademark · Serial No. 78946247 · Reg. No. 3335179
Telephones [ and other assistive listening devices ] encompassing a digital signal processor, [ namely, personal sound amplification devices, namely, audio amplifiers for the hearing impaired; ] corded and cordless amplified telephones [ ; portable telephone handset amplifiers; wireless sound amplification headsets utilizing radio frequency data transmission ]
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.