DIFF Main Group
H04J 13/00 Code division multiplex systems (for frequency hopping H04B1/713)
Introduced: July 1974
Title
Titles differ between systems:
IPC: Code division multiplex systems
CPC: Code division multiplex systems (for frequency hopping H04B1/713)
Full Title
Full titles differ between systems:
IPC:
Code division multiplex systems
CPC:
Code division multiplex systems (for frequency hopping H04B1/713)
CPC subdivides this area 4x more granularly than IPC with 5 additional codes.
5 codes are CPC-only extensions.
IPC defines codes here since 2011.
Child Classifications
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