Patent classifications
G
PHYSICS
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G09
EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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G09F
DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
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13/00
Illuminated signs; Luminous advertising
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G09F13/16
Signs formed of or incorporating reflecting elements or surfaces, e.g. warning signs having triangular or other geometrical shape
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