DIFF Subgroup
H04R 1/40 by combining a number of identical transducers
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Details of transducers > Arrangements for obtaining desired frequency or directional characteristics > for obtaining desired directional characteristic only > by combining a number of identical transducers
CPC:
Details of transducers, > Arrangements for obtaining desired frequency or directional characteristics (for stereophonic purpose H04R5/00) > for obtaining desired directional characteristic only > by combining a number of identical transducers
Of 2 combined children, 0 exist in both systems.
2 codes are CPC-only extensions.
Child Classifications
Navigate with arrow keys, Enter to open