Patent classifications
H
ELECTRICITY
Load children
H04
ELECTRIC COMMUNICATION TECHNIQUE
Load children
H04R
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
Load children
2201/00
Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
Load children Filter patents View analytics View as hierarchy
H04R2201/40
Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
Load children Filter patents View analytics View as hierarchy
H04R2201/405
Non-uniform arrays of transducers or a plurality of uniform arrays with different transducer spacing
Filter patents View analytics View as hierarchy