GR Technologies, LLC. mouthpiece blank designs have been US Patent Protected.
US Patent Office Registered
Configuration Trademark Issued to GR Technologies - Reg. No. 3,113,456 Issue
date: July 11, 2006.
“The mark consists of a configuration of a musical instrument, namely, a
substantially cylindrical portion adjacent to the bowl portion of the mouthpiece
of a Brass Instrument.”
More info to follow...