by aeroplanes, airships, balloons, or kites

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Mobile visual advertising > by aeroplanes, airships, balloons, or kites

CPC:

Mobile visual advertising (combined visual and audible advertising G09F27/00) > by aeroplanes, airships, balloons, or kites

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

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G09F 21/08 the advertising matter being arranged on the aircraft IPC+CPC Available in IPC and CPC
G09F 21/12 the advertising matter being towed by the aircraft IPC+CPC Available in IPC and CPC
G09F 21/16 Sky-writing IPC+CPC Available in IPC and CPC