DIFF Subgroup
G10K 15/04 Sound-producing devices (G10K15/02 takes precedence)
Introduced: January 1985
Title
Titles differ between systems:
IPC: Sound-producing devices
CPC: Sound-producing devices (G10K15/02 takes precedence)
Full Title
Full titles differ between systems:
IPC:
Acoustics not otherwise provided for > Sound-producing devices
CPC:
Acoustics not otherwise provided for > Sound-producing devices (G10K15/02 takes precedence)
CPC subdivides this area 3x more granularly than IPC with 2 additional codes.
2 codes are CPC-only extensions.
IPC defines codes here since 1985.
Child Classifications
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