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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11/00
Indicating arrangements for variable information in which the complete information is permanently attached to a movable support which brings it to the display position
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G09F11/18
the display elements being carried by belts, chains, or the like other than endless
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G09F11/21
the elements being flexible sheets
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