U.S. federal trademark · Serial No. 99885586
Glass being structural parts of diaphragms; diaphragms of glass; diaphragms; diaphragms [acoustics]; loudspeakers; loudspeakers with a glass diaphragm
Unworked or semi-worked glass, except building glass; sheet glass; glass for diaphragms
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.