having multiple resonators (crystal tuning forks H03H9/21)

Introduced: January 1980

Title

Titles differ between systems:

IPC: having multiple resonators

CPC: having multiple resonators (crystal tuning forks H03H9/21)

Full Title

Full titles differ between systems:

IPC:

Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators > Constructional features of resonators consisting of piezoelectric or electrostrictive material > having multiple resonators

CPC:

Networks comprising electromechanical or electro-acoustic elements; Electromechanical resonators (electro-acoustic transducers such as loudspeakers, microphones or gramophone pick-ups H04R; piezoelectric, electrostrictive or magnetostrictive devices with mechanical input or output, e.g. actuators or sensors, H10N30/00, H10N35/00) > Constructional features of resonators consisting of piezoelectric or electrostrictive material (H03H9/25 takes precedence) > having multiple resonators (crystal tuning forks H03H9/21)

No child classifications to compare. This is a leaf node in both IPC and CPC.