Patent Classification Explorer PCE

DIFF Main Group

G09F 27/00

Combined visual and audible advertising or displaying, e.g. for public address

Introduced: September 1968

Of 7 combined children, 0 exist in both systems.

7 codes are CPC-only extensions.

Note: 2 CPC extensions are marked as secondary classification only.

Child Classifications

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G09F 2027/001 2nd only CPC only CPC only
G09F 2027/002 2nd only CPC only CPC only
G09F 27/004 CPC only CPC only
G09F 27/005 CPC only CPC only
G09F 27/007 CPC only CPC only
G09F 27/008 CPC only CPC only
G09F 27/009 CPC only CPC only