.~ Delay lines including elastic bulk wave propagation means {7}
147
.~.~ Propagation path has significant chemical or physical properties
DEFINITION
Classification: 333/147
Propagation path has significant chemical or physical properties:
(under subclass 141) Subject matter wherein the material of the structure for transmitting mechanical waves significantly affects the delay characteristic.
(1) Note. The material, as a result if it is crystalline structure or of its composition, may provide low losses, low scattering, low dispersion, controlled dispersion, increased power handling capabilities, or temperature stability.
(2) Note. Included in this subclass are devices wherein the structure for transmitting mechanical waves is polarized, semiconductive, gyromagnetic, ferroelectric, superconductive, magnetoelastic, or is capable of magnetostatic wave propagation.
