Casings; Cabinets Mountings therein (H04R1/28 takes precedence )

Introduced: September 1968

Title

Titles differ between systems:

IPC: Casings; Cabinets; Mountings therein

CPC: Casings; Cabinets Mountings therein (H04R1/28 takes precedence )

Full titles differ between systems:

IPC:

Details of transducers > Casings; Cabinets; Mountings therein

CPC:

Details of transducers, > Casings; Cabinets Mountings therein (H04R1/28 takes precedence )

Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means

CPC subdivides this area 6x more granularly than IPC with 5 additional codes.

5 codes are CPC-only extensions.

1 shared codes have differing titles between IPC and CPC.

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H04R 1/021 CPC only CPC only
H04R 1/023 CPC only CPC only
H04R 1/025 CPC only CPC only
H04R 1/026 CPC only CPC only
H04R 1/028 CPC only CPC only
H04R 1/04 Structural association of microphone with electric circuitry therefor (in electric hearing aids H04R25/00) IPC+CPC Available in IPC and CPC

Class H04,2013–2023, worldwide · Source: EPO PATSTAT

Class H04,2013–2023, worldwide · Source: EPO PATSTAT