IPC Subgroup
G09F 13/04 Signs, boards, or panels, illuminated from behind the insignia
Introduced: September 1968
Last revised: January 2006
Full Title
Illuminated signs; Luminous advertising > Signs, boards, or panels, illuminated from behind the insignia
Classification Context
- Section:
- PHYSICS
- Class:
- EDUCATING; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- Subclass:
- DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
4 direct subcodes
Child Classifications
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- G09F 13/06 using individual cut-out symbols or cut-out silhouettes, e.g. perforated signs
- G09F 13/08 using both translucent and non-translucent layers
- G09F 13/12 using a transparent mirror or other light- reflecting surface transparent to transmitted light whereby a sign, symbol, picture, or other information is visible only when illuminated
- G09F 13/14 Arrangements of reflectors therein