(under subclass 311) Subject matter combined with a means for changing the mass of the piezoelectric element, e.g., depositing mass onto or evaporating mass from the surface of a piezoelectric element to change its resonant frequency.
(1) Note. Other methods of changing the mass include grinding, cutting, or chemical etching.
SEE OR SEARCH CLASS
29, Metal Working,
25.35, where the changing of the mass may be a step in the manufacture of a piezoelectric device.
