Space-based or airborne stations; (H04B7/204 takes precedence)

Introduced: July 1974

Title

Titles differ between systems:

IPC: Space-based or airborne stations

CPC: Space-based or airborne stations; (H04B7/204 takes precedence)

Full Title

Full titles differ between systems:

IPC:

Radio transmission systems, i.e. using radiation field > Relay systems > Active relay systems > Space-based or airborne stations

CPC:

Radio transmission systems, i.e. using radiation field (H04B10/00, H04B15/00 take precedence) > Relay systems > Active relay systems > Space-based or airborne stations; (H04B7/204 takes precedence)

CPC subdivides this area 5x more granularly than IPC with 8 additional codes.

8 codes are CPC-only extensions.

IPC defines codes here since 1974.

Child Classifications

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H04B 7/18502 +2 CPC CPC only CPC only
H04B 7/1851 +4 CPC CPC only CPC only
H04B 7/18521 CPC only CPC only
H04B 7/18523 +1 CPC CPC only CPC only
H04B 7/18528 CPC only CPC only
H04B 7/1853 +8 CPC CPC only CPC only
H04B 7/18576 CPC only CPC only
H04B 7/18578 +9 CPC CPC only CPC only
H04B 7/19 Earth-synchronous stations since 1974 IPC+CPC Available in IPC and CPC
H04B 7/195 Non-synchronous stations since 1974 IPC+CPC Available in IPC and CPC