.~ Phonon type (e.g., ultrasonic wave propagating device)
DEFINITION
Classification: 330/5.5
(under subclass 5) Subject matter wherein the solid-state means is adapted to propagate and amplify signal waves in the form of acoustic, ultrasonic or hypersonic elastic waves of the phonon type.
SEE OR SEARCH CLASS
181, Acoustics,
.5, for mechanical travelling wave structures for propagating acoustic wave.
307, Electrical Transmission or Interconnection Systems,
424, for nonoptical parametric amplifier frequency converters which may employ acoustic waves (e.g., Raman or Brillcuin devices).
310, Electrical Generator or Motor Structure, 311+, piezoelectric devices in general which may propagate elastic waves of the phonon type.
333, Wave Transmission Lines and Networks,
138+, for wave delay networks and subclasses 187+ for wave filters utilizing piezoelelectric wave propagating elements.
359, Optics: Systems (Including Communication) and Elements,
326+, for parametric optical frequency translators.
367, Communications, Electrical: Acoustic Wave Systems and
Devices, for compressional wave systems or transducers which may employ solid element wave propagating devices of the sonic or supersonic type.
